Engineer 418 & 818
User Guide
The Martin Experience
All material © 2011. Martin Audio Ltd. Subject to change without notice.
Martin Audio Engineer 418 & 818
User Manual
Engineer 418 & 818 User Manual
Page 2
Contents
Contents ................................................................................................. 3
Declaration of Conformity: Engineer 418 ..................................................... 6
Declaration of Conformity: Engineer 818 ..................................................... 7
Important Safety Instructions .................................................................... 8
Disclaimer.......................................................................................... 9
About this Manual ............................................................................... 9
Customer Service and Warranty ........................................................... 9
Recycling and hazardous substances ..................................................... 9
1: Description........................................................................................ 10
Application ....................................................................................... 10
Features .......................................................................................... 10
2. Products............................................................................................
Engineer 418....................................................................................
Engineer 818....................................................................................
Engineer Remote ..............................................................................
Engineer Remote Spider (optional) .....................................................
12
12
12
13
13
3: Engineer 418 .....................................................................................
Included Items .................................................................................
Front Panel layout .............................................................................
Rear Panel layout..............................................................................
Installation requirements ...................................................................
Connecting Audio ..............................................................................
Connection instructions for Phoenix terminal blocks ..............................
Connecting RS-232 ...........................................................................
Connecting RS-485 ...........................................................................
Power Requirements .........................................................................
Power switch ....................................................................................
Power LED .......................................................................................
RS-232 front panel cover ...................................................................
14
14
14
15
16
16
17
18
18
18
19
19
19
4: Engineer 818 .....................................................................................
Included Items .................................................................................
Front Panel layout .............................................................................
Rear Panel layout..............................................................................
Installation requirements ...................................................................
Connecting Audio ..............................................................................
Connection instructions for Phoenix terminal blocks ..............................
Connecting RS-232 ...........................................................................
Connecting RS-485 ...........................................................................
Power Requirements .........................................................................
Power switch ....................................................................................
Power LED .......................................................................................
RS-232 front panel cover ...................................................................
20
20
20
21
22
22
23
24
24
24
25
25
25
Engineer 418 & 818 User Manual
Page 3
5: Engineer Remote ...............................................................................
Panel layout .....................................................................................
Installation ......................................................................................
Power..............................................................................................
Wiring .............................................................................................
Wiring scheme .................................................................................
Header ............................................................................................
Connecting multiple Engineer Remotes to an Engineer ..........................
Checking proper connection ...............................................................
Recalling presets ..............................................................................
Changing volumes ............................................................................
26
26
27
28
28
29
30
30
30
31
31
6: Troubleshooting .................................................................................
Power..............................................................................................
Data 32
Remote ...........................................................................................
Audio ..............................................................................................
32
32
32
33
7: Maintenance ...................................................................................... 34
Housing ........................................................................................... 34
Servicing ......................................................................................... 34
8: Software ...........................................................................................
Introduction .....................................................................................
Before you start ...............................................................................
Installation ......................................................................................
Uninstalling the software ...................................................................
Concepts and terminology..................................................................
Presets, projects and the workspace ............................................
Synchronization .........................................................................
Zones 39
Security...........................................................................................
Logging in.................................................................................
How it works .............................................................................
Main control .....................................................................................
The routing matrix .....................................................................
Effects channels ........................................................................
Labelling your channels ..............................................................
Accessing functionality ...............................................................
Input controls ..................................................................................
Output controls ................................................................................
The output channel tab...............................................................
Engineer algorithm concept ................................................................
The problem .............................................................................
The solution ..............................................................................
Engineer advanced configuration ........................................................
The big picture ..........................................................................
Determining the source frequency range ......................................
Setting the Autocatch .................................................................
Max cut, max boost and the correction indicators ..........................
Correction speed, reaction time and threshold ...............................
Peak limiters .............................................................................
Engineer 418 & 818 User Manual
35
35
36
37
37
38
38
39
40
40
41
42
42
43
44
44
44
45
46
49
49
51
51
53
54
55
56
57
58
Page 4
Exit equalizer ............................................................................
Engineer simple control .....................................................................
Basscreator algorithm .......................................................................
Concept ....................................................................................
Controlling the Basscreator .........................................................
Presets and projects..........................................................................
Linking channels ...............................................................................
Zoning output channels .....................................................................
Daylight saving ................................................................................
Scheduler ........................................................................................
Limiter overview ...............................................................................
Preferences ......................................................................................
Usage tips .......................................................................................
Frequently asked question .................................................................
Preset and Zone Communication Protocol ............................................
Introduction ..............................................................................
Connecting to the Engineer .........................................................
Recalling presets .......................................................................
Setting master- and zone volumes ...............................................
59
60
61
61
62
63
65
66
67
68
69
70
71
72
74
74
74
75
76
9: Engineer 418/818 Specifications ..........................................................
Mechanical ................................................................................
Electrical ..................................................................................
Environmental specifications .......................................................
Connections ..............................................................................
Audio 79
Processing ................................................................................
Software ...................................................................................
Parametric Equalisation ..............................................................
High-And Lowpass Filters ............................................................
Limiters ....................................................................................
Basscreator Algorithm ................................................................
Engineer Algorithm ....................................................................
Presets .....................................................................................
Security....................................................................................
78
78
78
78
78
Engineer 418 & 818 User Manual
79
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Page 5
Declaration of Conformity: Engineer 418
Manufacturer's name:
XLNT Advanced Technologies
Adress:
Zonnebaan 42
3542 EG Utrecht
The Netherlands
Declares that the product:
Name: Engineer 418
Conforms to the following EEC Directives
Low Voltage Directive 2006/95/EC
EN 60065 : 2002
IEC 60065 :2001 Modified
EMC Directive 2004/108/EC
EN 55103-1 (1996)
EN 55103-2 (1996)
EN 61000-3-2 (2000) +A2 (2005)
EN 61000-3-3 (1995) + A1 (2001) + A2 (2005)
Utrecht 25 January, 2008
XLNT Advanced Technologies
Engineer 418 & 818 User Manual
Page 6
Declaration of Conformity: Engineer 818
Manufacturer's name:
XLNT Advanced Technologies
Adress:
Zonnebaan 42
3542 EG Utrecht
The Netherlands
Declares that the product:
Name: Engineer 818
Conforms to the following EEC Directives
Low Voltage Directive 2006/95/EC
EN 60065 : 2002
IEC 60065 :2001 Modified
EMC Directive 2004/108/EC
EN 55103-1 (1996)
EN 55103-2 (1996)
EN 61000-3-2 (2000) +A2 (2005)
EN 61000-3-3 (1995) + A1 (2001) + A2 (2005)
Utrecht 25 January, 2008
XLNT Advanced Technologies
Engineer 418 & 818 User Manual
Page 7
Important Safety Instructions
It is extremely important to read ALL safety information and instructions provided in this manual and any
accompanying documentation before installing and operating the products described herein.
Heed all cautions and warnings during installation and use of this product.
Keep this instruction manual for future reference
This unit does not contain any user serviceable parts.
Do not open this unit. Doing so will void warranty and might present a risk. Servicing must be performed by
qualified personnel only. Servicing is required when the apparatus has been damaged in any way, such as
power-supply cord or plug being damaged, liquid has been spilled or objects have fallen into the apparatus,
the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
This unit is designed for indoor use. Do not use this unit in a wet or damp environment or near to water.
Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
This unit is not designed for residential use.
Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
Do not defeat the safety purpose of the polarized or grounding-type plug. If the provided plug does not fit into
your outlet, consult an electrician for replacement of the obsolete connector.
Always replace a blown fuse by a compatible fuse.
Do not connect or disconnect the power connector under load.
Protect the power lead from being walked on or pinched particularly at plugs, convenience receptacles, and
the point where they exit from the apparatus. When damaged, replace the power lead.
Unplug this apparatus during lightning storms or when unused for long periods of time.
Engineer 418 & 818 User Manual
Page 8
Disclaimer
All rights reserved. Although the information in this manual has been compiled with care, individual items may
vary in size, ratings and functionality from what is included in this manual.
Martin Audio Ltd. disclaims any liability for damage, losses or other consequences suffered or incurred in
connection with the use of the measurements, data or information contained in this manual. Martin Audio Ltd.
may change this product without prior notice.
Copyright: TeamProjects BV 2007.
Microsoft, Windows Vista and Windows are either registered trademarks or trademarks of Microsoft
Corp.
About this Manual
This Installation Manual provides basic information explaining the functionality, installation, operation,
programming and maintenance of the Martin Audio Engineer 418 and Martin Audio Engineer 818.
This manual serves as a first reference for the use of this product.
Customer Service and Warranty
This product is supplied with a limited warranty for 24 months following purchase.
To obtain warranty service, please contact your local Martin Audio Ltd. Dealer.
Please do not send equipment to Martin Audio Ltd. without authorization. If asked to do so, please add a copy
of the original invoice, together with the faulty device in a secure shipping container.
Recycling and hazardous substances
This product complies with the EU RoHS Reduction of Hazardous Substances directive (2002/96/EC) and WEEE
Waste Electrical and Electronic Equipment directive (2002/95/EC).
The selection of hazardous substances in all components and parts has been reviewed with care in order to
comply with or exceed the RoHS directive.
If this product, when purchased and used in the EU, has reached the end of its useful life it may be returned to
the original dealer at no cost or to Martin Audio Ltd. with a proof of ownership.
Engineer 418 & 818 User Manual
Page 9
1: Description
Application
Thank you for choosing the Martin Audio Engineer for your application. The Martin Audio Engineer is a
powerful, advanced audio DSP product, built into a 19” rack mount enclosure, designed for permanently
installed entertainment audio systems.
On top of the ‘normal’ crossover and routing functionality The Martin Audio Engineer features two unique
highly advanced specialist audio algorithms.
The first one being the dream of every audio reinforcement system installer and owner: an automated sound
engineer-in-a-box called ‘The Engineer’, operating 24-7 to maintain a quality, consistent sound in the venue.
The second one being the Basscreator algorithm, a psycho acoustical effects module which gives the
appearance that small speakers are sounding like they are a lot bigger, with unexpected amounts of perceived
low-frequency output.
The device also features an advanced scheduler, to have presets recalled at pre-programmed time events.
Furthermore, the device features an external remote control panel which can be connected through a RS-485
port.
This RS-485 port can also be used for controlling the device with third party serial control systems.
The combination of these features makes the Martin Audio Engineer an outstanding one-box problem solver
for any installation where high quality and ease of operation are important factors.
Features
 4 inputs and 8 outputs with complete freely routable signal path (Engineer 418)
 8 inputs and 8 outputs with complete freely routable signal path (Engineer 818)
 8-band fully parametric EQ on every input.
 8-band fully parametric EQ on every output.
 Highpass and Lowpass filters on every output with slopes up to 24 dB/oct. featuring L-R, Butterworth
and Bessel filters
 Speaker alignment delays of up to 10ms on every output.
 The most musical-sounding speaker protection limiters in the business on every output.
Engineer 418 & 818 User Manual
Page 10
 Very high, musical sound quality throughout.
 Unique Engineer DSP algorithm, working 24-7 to keep a consistent sound in your venue.
 Unique Basscreator algorithm, gives small speakers the perceived low frequency response of a large
speaker.
 Flexible build-in scheduler for automated preset recalling.
 RS-232 interface for extensive PC-based setup and control.
 Windows® PC software for controlling and programming
 Programmable remote control with RS-485 interface on industry-standard RJ-45 connector.
 Up to 4 remote controls can co-operate on one Engineer through the use of an optional Remote
Spider.
Engineer 418 & 818 User Manual
Page 11
2. Products
The Martin Audio Engineer product line comprises 2 products and 2 accessories.
Engineer 418
4 input-8 output advanced audio Digital Signal Processing device. 100-240V AC input. Housing is 19” rack
mounted. Audio in- and outputs on balanced Phoenix terminal blocks. RS485 interface for remote control
panel and third party control connection, RS-232 interface for extensive PC-based setup and control.
Engineer 818
8 input-8 output advanced audio Digital Signal Processing device. 100-240V AC input. Housing is 19” rack
mounted. Audio in- and outputs on balanced Phoenix terminal blocks. RS485 interface for remote control
panel and third party control connection, RS-232 interface for extensive PC-based setup and control.
Engineer 418 & 818 User Manual
Page 12
Engineer Remote
Remote control panel for Martin Audio Engineer 418 and Martin Audio Engineer 818. Enables remote recall of
presets and remote control of zone volumes, The Martin Audio Engineer Remote is connected to and powered
from a dedicated RS-485 port on the Martin Audio Engineer 418 or Martin Audio Engineer 818. This accessory
is included with every Martin Audio Engineer 418 and Martin Audio Engineer 818.
Engineer Remote Spider (optional)
The Martin Audio Engineer Remote Spider is an optional accessory, allowing you to connect up to 4 Martin
Audio Engineer Remotes to one Martin Audio Engineer 418 or Martin Audio Engineer 818.
Engineer 418 & 818 User Manual
Page 13
3: Engineer 418
Included Items
In the box containing this manual, the following items should be present:
1 Martin Audio Ltd. Engineer 418
1 Engineer remote panel
1 Engineer remote mounting plate
1 Engineer front panel cover set w/ 2 screws
3 12-pin Phoenix plug-in terminal blocks
1 Fully wired 1:1 DB09-DB09 M/F RS232 cable
1 Manual (this manual)
1 Power lead
1 CDROM with Windows® software
Front Panel layout
Engineer 418 & 818 User Manual
1
Power Switch
2
RS-232 port
3
Power Led
Page 14
Rear Panel layout
1
Audio Inputs
2
Audio Outputs
3
RS-485 port (RJ45 connector)
4
Power connector
5
Fuse Holder
+
audio hot
-
audio cold
audio ground
Engineer 418 & 818 User Manual
Page 15
Installation requirements
The Martin Audio Engineer 418 is designed for 19” rack-mount use.
Mount the Martin Audio Engineer 418 with racking screws in a 19” cabinet. Use support strips as necessary to
support the rear of the device.
Adequate ventilation and rear-support must be provided. Allow for enough ventilation into the 19” cabinet in
which the Martin Audio Engineer 418 is mounted. Observe the environmental specifications (see appendix 2)
at all times.
When mounting the Martin Audio Engineer 418 in a touring rack, a touring rack with shock-absorbing racking
strips should always be used.
Always install the Martin Audio Engineer 418 in a level plane. A maximum allowable angle of 10 degrees is
acceptable.
Do not use the Martin Audio Engineer 418 in a wet/damp environment.
Do not block any ventilation slot at any time and check the proper function of the fans at regular basis. If the
fans do not operate properly, the lifespan of the device will be significantly reduced and the device may
even fail.
Connecting Audio
Use only certified balanced & shielded audio signal cabling (e.g. Belden 8718, Tasker C208). Refer to the next
paragraph for maximum allowable conductor cross sections.
The connectors on the Martin Audio Engineer 418 accept 12-pin Phoenix terminal blocks (as supplied). Refer to
the next paragraph for instructions how to terminate the audio wiring.
From left-to-right are INTPUT 1-4 and OUTPUT 1-8. The connections are labeled: (please refer to rear panel
layout)
+
-
For audio hot
For audio cold
For audio ground
Attention: Martin Audio strongly recommends the use of balanced audio connections only.
Engineer 418 & 818 User Manual
Page 16
Connection instructions for Phoenix terminal blocks
To connect the Phoenix terminal blocks, always use the following procedure:
 strip the jacket 20mm
 strip the wires 7 mm
 DO NOT pre tin the wires
 cover the ground wire with a heat shrink sleeving
 put the wire up to the plastic sleeve in the terminal block
 use a small flathead screwdriver to firmly close the contact
 make a strain relief so no stain is on the connection
 for suitable wire thickness, please refer to the table below
2
Conductor cross section solid min.
0.2 mm
Conductor cross section solid max.
2.5 mm
Conductor cross section stranded min.
0.2 mm
Conductor cross section stranded max.
2.5 mm
Conductor cross section stranded, with ferrule without plastic sleeve min.
0.25 mm
Conductor cross section stranded, with ferrule without plastic sleeve max.
2.5 mm
Conductor cross section stranded, with ferrule with plastic sleeve min.
0.25 mm
Conductor cross section stranded, with ferrule with plastic sleeve max.
2.5 mm
Engineer 418 & 818 User Manual
2
2
2
2
2
2
2
Page 17
Connecting RS-232
On the front of the device is the RS-232 port for remote control and configuration of the device with a PC with
the supplied Windows® Engineer software. To connect the Martin Audio Engineer to a PC use the supplied
RS232 cable only. This cable is 1:1 connected, fully wired, one side fitted with a Male DB9 connector, other
side a Female DB9 connector.
If a longer cable is required please observe that the maximum operational cable length is typically 45 feet.
Warning: if the users’ PC uses a grounded power supply, make sure that the Martin Audio Engineer 418 and
the PC are on the same power distribution line to avoid data errors.
Connecting RS-485
On the rear of the device, next to the audio inputs, is the RS-485 port on a RJ-45 connector, used to connect
the Martin Audio Engineer 418 to the Martin Audio Engineer Remote or to an external third party control unit.
(e.g. Crestron/AMX). For communication protocol please see the appropriate Chapter
The maximum operational cable length is typically 1000 ft. on CAT-5 (Unshielded Twisted Pairs) cable.
The RS-485 connection includes a +5V power line for powering the Engineer Remote. (Please refer to the
wiring scheme in the chapter “Engineer Remote”)
Warning: if an external third party control unit is used with the RS-485 port, this device must have a double
isolated power supply.
Power Requirements
The Martin Audio Engineer 818 must be connected to a 100-240V AC 50-60Hz electrical power supply, with a
single phase, neutral and ground connection. Both the neutral and the phase of the power supply (building
fuse) need to be protected by a fuse with a maximum current of 16A. For safety reasons the Martin Audio
Engineer 818 must be connected to a properly grounded power outlet.
Always use the 3-pin IEC power cord supplied with the Martin Audio Engineer 418.
The power input fuse is located below the 3-pin IEC power input. Do not use a different type of fuse; always
replace a blown fuse with a compatible fuse.
Engineer 418 & 818 User Manual
Page 18
Power switch
The Martin Audio Engineer 418 has a power switch which is accessible through the hole in the front panel
(please refer to the front panel layout). Although the device is designed to be left on at all times, it is possible
to un-power the device with this switch. To switch ON/OFF, use a Philips #1 screwdriver to operate the power
switch through the hole.
Warning: Since the mains power plug can be used as the main disconnection device, care must be must be
taken during installation that this plug is made easily accessible at all times.
Power LED
The blue power LED shows the status of the isolated 5V power supply to the digital circuits. When lit, this
power supply is active.
Note that the other internal power supply circuits do not have an external or internal status indicator.
RS-232 front panel cover
When the RS-232 port on the front of the device is not used, the RS-232 port may be covered with the supplied
RS-232 front panel cover. Use the two supplied screws to attach the cover to the front panel. These screws
have holes drilled through the heads which may be used to seal the RS-232 port so unwanted operation is
prohibited.
Engineer 418 & 818 User Manual
Page 19
4: Engineer 818
Included Items
In the box containing this manual, the following items should be present:
1 Martin Audio Ltd. Engineer 818
1 Engineer remote panel
1 Engineer remote mounting plate
1 Engineer front panel cover set w/ 2 screws
3 12-pin Phoenix plug-in terminal blocks
1 Fully wired 1:1 DB09-DB09 M/F RS232 cable
1 Manual (this manual)
1 Power lead
1 CDROM with Windows® software
Front Panel layout
Engineer 418 & 818 User Manual
1
Power Switch
2
RS-232 port
3
Power Led
Page 20
Rear Panel layout
1
Audio Inputs
2
Audio Outputs
3
RS-485 port (RJ45 connector)
4
Power connector
5
Fuse Holder
+
-
audio hot
audio cold
audio ground
Engineer 418 & 818 User Manual
Page 21
Installation requirements
The Martin Audio Engineer 818 is designed for 19” rack-mount use.
Mount the Martin Audio Engineer 818 with racking screws in a 19” cabinet. Use support strips as necessary to
support the rear of the device.
Adequate ventilation and rear-support must be provided. Allow for enough ventilation into the 19” cabinet in
which the Martin Audio Engineer 818 is mounted. Observe the environmental specifications (see appendix 2)
at all times.
When mounting the Martin Audio Engineer 818 in a touring rack, a touring rack with shock-absorbing racking
strips should always be used.
Always install the Martin Audio Engineer 818 in a level plane. A maximum allowable angle of 10 degrees is
acceptable.
Do not use the Martin Audio Engineer 818 in a wet/damp environment.
Do not block any ventilation slot at any time and check the proper function of the fans at regular basis. If the
fans do not operate properly, the lifespan of the device will be significantly reduced and the device may
even fail.
Connecting Audio
Use only certified balanced & shielded audio signal cabling (e.g. Belden 8718, Tasker C208). The connectors on
the Martin Audio Engineer 818 accept 12-pin Phoenix terminal blocks (as supplied). From left-to-right are
INTPUT 1-8 and OUTPUT 1-8. The connections are labelled: (please refer to rear panel layout)
+
-
For audio hot
For audio cold
For audio ground
Attention: Martin Audio strongly recommends the use of balanced audio connections only.
Engineer 418 & 818 User Manual
Page 22
Connection instructions for Phoenix terminal blocks
To connect the Phoenix terminal blocks, always use the following procedure:
 strip the jacket 20mm
 strip the wires 7 mm
 in case of stranded wires, pre tin the wires
 cover the ground wire with a heat shrink sleeving
 put the wire up to the plastic sleeve in the terminal block
 use a small flathead screwdriver to firmly close the contact
 make a strain relief so no stain is on the connection
 for suitable wire thickness, please refer to the table below
2
Conductor cross section solid min.
0.2 mm
Conductor cross section solid max.
2.5 mm
Conductor cross section stranded min.
0.2 mm
Conductor cross section stranded max.
2.5 mm
Conductor cross section stranded, with ferrule without plastic sleeve min.
0.25 mm
Conductor cross section stranded, with ferrule without plastic sleeve max.
2.5 mm
Conductor cross section stranded, with ferrule with plastic sleeve min.
0.25 mm
Conductor cross section stranded, with ferrule with plastic sleeve max.
2.5 mm
Engineer 418 & 818 User Manual
2
2
2
2
2
2
2
Page 23
Connecting RS-232
On the front of the device is the RS-232 port for remote control and configuration of the device with a PC with
the supplied Windows® Engineer software. To connect the Martin Audio Engineer to a PC use the supplied
RS232 cable only This cable is 1:1 connected, fully wired, one side fitted with a Male DB9 connector, other side
a Female DB9 connector. If a longer cable is required please observe that the maximum operational cable
length is typically 45 feet.
Warning: if the users’ PC uses a grounded power supply, make sure that the Martin Audio Engineer 418 and
the PC are on the same power distribution line to avoid data errors.
Connecting RS-485
On the rear of the device, next to the audio inputs, is the RS-485 port on a RJ-45 connector, used to connect
the Martin Audio Engineer 818 to the Martin Audio Engineer Remote or to an external third party control unit.
(e.g. Crestron/AMX). (For communication protocol please refer to the Engineer software manual)
The maximum operational cable length is typically 1000 ft. on CAT-5 (Unshielded Twisted Pairs) cable.
The RS-485 connection includes a+5V power line for powering the Engineer Remote. (Please refer to the wiring
scheme in the chapter “Engineer Remote”.)
Warning: if an external third party control unit is used with the RS-485 port, this device must have a double
isolated power supply.
Power Requirements
The Martin Audio Engineer 818 must be connected to a 100-240V AC 50-60Hz electrical power supply, with a
single phase, neutral and ground connection. Both the neutral and the phase of the power supply (building
fuse) need to be protected by a fuse with a maximum current of 16A. For safety reasons the Martin Audio
Engineer 818 must be connected to a properly grounded power outlet.
Always use the 3-pin IEC power cord supplied with the Martin Audio Engineer 818.
The power input fuse is located below the 3-pin IEC power input. Do not use a different type of fuse; always
replace a blown fuse with a compatible fuse.
Engineer 418 & 818 User Manual
Page 24
Power switch
The Martin Audio Engineer 818 has a power switch which is accessible through the hole in the front panel
(please refer to the front panel layout). Although the device is designed to be left on at all times, it is possible
to un-power the device with this switch. To switch ON/OFF, use a Philips 1 screwdriver to operate the power
switch through the hole.
Warning: Since the mains power plug can be used as the main disconnection device, care must be taken
during installation that this plug is made easily accessible at all times.
Power LED
The blue power LED shows the status of the isolated 5V power supply to the digital circuits. When lit, this
power supply is active.
Note that the other internal power supply circuits do not have an external or internal status indicator.
RS-232 front panel cover
When the RS-232 port on the front of the device is not used, the RS-232 port may be covered with the supplied
RS-232 front panel cover. Use the two supplied screws to attach the cover to the front panel. The supplied
screws have holes drilled through the heads which may be used to seal the RS-232 port so unwanted operation
is prohibited.
Engineer 418 & 818 User Manual
Page 25
5: Engineer Remote
When the user has created zones and presets on the Martin Audio Engineer 418/818 with the supplied
Windows® PC software, the Engineer Remote (supplied with the Martin Audio Engineer 418 or Martin Audio
Engineer 818) can be used to recall presets and control the volume of the zones on the Martin Audio Engineer
418 or Martin Audio Engineer 818. (For more information please see the software manual.)
Panel layout
1
2
3
4
Engineer 418 & 818 User Manual
Preset select buttons
Zone select buttons
Volume set buttons
LCD display with backlight
Page 26
Installation
The Martin Audio Engineer Remote panel is to be mounted onto a standard DIN installation box and finish
cover. The figure below shows how to install the product into the installation box.
1
- Attach the Martin Audio Engineer remote mounting plate to the DIN installation box with two M3
screws (length as required)
2
- Connect the CAT5 cable to the header on the Engineer Remote (see: wiring scheme)
3
- Push the Engineer Remote onto the mounting plate, with a suitable finish cover in between.
Engineer 418 & 818 User Manual
Page 27
Power
The Engineer Remote is powered from the Martin Audio Engineer 418 or Martin Audio Engineer 818 with a 5
volt DC power supply, incorporated in the RS-485 connector, no external power supply is required.
Wiring
The Engineer Remote is connected through the RS-485 connector on RJ-45 plug on the backside of the device.
The maximum operational cable length is typically 1000 ft. on CAT-5 (Unshielded Twisted Pairs) cable. (e.g.
Belden 7918a, Tasker C705)
Engineer 418 & 818 User Manual
Page 28
Wiring scheme
Please make sure that the wires are properly connected according to the wiring scheme below:
PIN
FUNCTION
RJ-45 CONNECTOR CABLE
PART
REMOTE HEADER
1
DATA OUT +
1 - ORANGE/WHITE
1 -ORANGE/WHITE
2
DATA OUT -
2 - ORANGE
2 -ORANGE
3
DATA IN +
3 - GREEN/WHITE
3 - GREEN/WHITE
4
POWER + 5 Volt
4- BLUE
4 - GREEN
5
POWER + 5 Volt
5 - BLUE/WHITE
5 - BLUE & BLUE/WHITE
6
DATA IN -
6 - GREEN
6 - BROWN & BROWN/WHITE
7
GROUND
7 - BROWN/WHITE
8
GROUND
8 -BROWN
Warning!: the colour scheme in the above table is just an example with the most
commonly used colour scheme in CAT-5 cabling, when connecting a remote DO NOT only
look at the colours, but instead check the pin configuration. Incorrect connection will
cause fatal damage to the remote!
RJ-45 Cable Part pin Remote Header pin
1
1
2
2
3
3
4
4
5
5
6
6
7
8
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Header
The Engineer Remote features a Wago terminal block 6-way header for the connection of the CAT5 cable. To
connect the cable to the header, strip the wires 7mm, use a small flathead screwdriver to firmly press down
one of the header pins, put the wire in the appropriate header hole and release the screwdriver. Do not press
down on two or more header pins at the same time; this may result in damage to the Engineer Remote.
Connecting multiple Engineer Remotes to an Engineer
With the use of the Engineer Remote Spider, it is possible to connect up to 4 Engineer Remotes to one Martin
Audio Engineer 418 or Martin Audio Engineer 818. For details please refer to the Martin Audio Engineer
Remote Spider manual.
Checking proper connection
If the Engineer Remote is powered by the Martin Audio Engineer, the backlight of the Engineer Remote will be
lit.
If the Engineer Remote is properly connected to the Martin Audio Engineer 418 or Martin Audio Engineer 818,
and one or more presets have been stored on a Martin Audio Engineer 418 or Martin Audio Engineer 818 with
the Engineer Windows® PC software, the display will show the name of the presets stored in the connected
Martin Audio Engineer 418 or Martin Audio Engineer 818 when pressing one of the ‘Preset’ up/down arrows
on the Engineer Remote. For further details please refer to the software chapter.
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Recalling presets
To recall a preset from the Martin Audio Engineer Remote, just press the ‘Preset’ up or down button, the
display will show ‘selecting’ and the name of the preset. After 3 seconds the currently selected preset is
recalled. Refer to the software chapter for creating and assigning presets.
Changing volumes
To change the volume of a zone, just press one off the ‘Zone’ up or down buttons. The display will show the
zones that have been created in the Engineer Windows® PC software and the MASTER volume. Once the
correct zone is selected, the volume is changed through the ‘Volume’ up and down arrows. Refer to the
software chapter for creating and assigning zones.
ATTENTION: To use the Engineer Remote, DISCONNECT THE PC from the Martin Audio Engineer 418 or
Martin Audio Engineer 818 If the Engineer Remote and the PC are connected at the same time, only the
connection between the PC and the Martin Audio Engineer 418 or Martin Audio 818 will be active.
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6: Troubleshooting
Power
If a Martin Audio Engineer 418 or Martin Audio Engineer 818 shows no power
 Check the Engineer 418/818’s power switch
 Check that the power source is functional, and ground, neutral and live connections are properly
seated
 Check the power lead for damage
 Check the Engineer 418/818’s fuse
 If the Engineer 418/818 still shows no power, contact your local Martin Audio Ltd. service point
Data
If the Engineer PC software can’t open a connection with the Martin Audio Engineer 418 or Martin Audio
Engineer 818







Check that the Engineer 418/818 is powered
Check if the RS232 is properly seated at both ends.
Check if the right COM-port is selected in the Engineer software (usually COM1)
Check if no other programs are using the PC’s COM port
Switch the Engineer 418/818 off for 15 seconds and switch it back on again
Restart the Engineer software
Restart the PC running the Engineer software
If the Engineer PC software still can’t get a connection with the Martin Audio Engineer 418 or Martin Audio
Engineer 818, contact your local Martin Audio Ltd. service point
Remote
If the Engineer Remote doesn’t connect to the Martin Audio Engineer 418 or Martin Audio Engineer 818
 Check that the Martin Audio Engineer 418 or Martin Audio Engineer 818 is powered
 Check if zones and presets have been properly stored in the Engineer software (see software manual)
 Switch the Martin Audio Engineer 418 or Martin Audio Engineer 818 off for 15 seconds and switch it
back on again
 Check If the RJ-45 connector on the back of the Martin Audio Engineer 418 or Martin Audio Engineer
818 is properly wired (see Remote wiring Scheme)
 Check If Engineer Remote is properly wired (see Remote wiring Scheme)
If the Engineer Remote still can’t get a connection with the Martin Audio Engineer 418 or Martin Audio
Engineer 818, contact your local Martin Audio Ltd. service point
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Audio
If no audio signal is entering the Martin Audio Engineer 418 or Martin Audio Engineer 818
 Check that the Martin Audio Engineer 418 or Martin Audio Engineer 818 is powered
 Check if you are actually sending audio to the Martin Audio Engineer 418 or Martin Audio Engineer
818 by checking the input meters in the Engineer PC software (see the software chapter)
 Check if all the gains, mutes and routing settings are set correctly in the Engineer PC software (see the
software chapter)
 Check the proper connection of your audio cabling to the Phoenix terminal blocks (see Connecting
audio)
 Switch the Martin Audio Engineer 418 or Martin Audio Engineer 818 off for 15 seconds and switch it
back on again
If still no audio signal is entering the Martin Audio Engineer 418 or Martin Audio Engineer 818, contact your
local Martin Audio Ltd. service point
If the Martin Audio Engineer 418 or Martin Audio Engineer 818 doesn’t send audio out its outputs
 Check that the Martin Audio Engineer 418 or Martin Audio Engineer 818 is powered
 Check if you are actually sending audio to the Martin Audio Engineer 418 or Martin Audio Engineer
818 outputs by checking the output meters in the Engineer PC software (see the software chapter)
 Check if all the gains, mutes and routing settings are set correctly in the Engineer PC software (see the
software chapter)
 Check the proper connection of your audio cabling to the Phoenix terminal blocks (see Connecting
audio)
 Switch the Martin Audio Engineer 418 or Martin Audio Engineer 818 off for 5 seconds and switch it
back on again
If still no audio signal is coming out off the Martin Audio Engineer 418 or Martin Audio Engineer 818, contact
your local Martin Audio Ltd. service point
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7: Maintenance
Housing
Clean the exterior housing with a slightly moist, lint free cloth.
Do not use abrasive cleaning agents.
If a product is used in a dusty environment (or in combination with smoke-machine oil) regular cleaning of the
internal fan by qualified personnel may be required.
Servicing
Do not open this unit.
Doing so will void warranty and might present a risk. Servicing must be performed by qualified personnel only.
Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug
being damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally, or has been dropped.
Always contact your local Martin Audio Ltd. dealer for instructions to obtain service.
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8: Software
Introduction
The Martin Audio Engineer is a powerful, advanced DSP platform meant for audio installations. It features 4 or
8 inputs and 8 outputs with extensive, flexible routing and cross-over functionality.
On top of the ‘normal’ cross-over and routing functionality it features two unique highly advanced specialist
audio algorithms.
The first one being the dream of every installer: an automated sound engineer-in-a-box called ‘The Engineer’,
working 24-7 to keep a nice, consistent sound in the venue.
The second one being the Basscreator algorithm, a psycho acoustical effect to make small speakers sound like
they are a lot bigger, with unexpected amounts of perceived low-frequency output from a small speaker.
The unit also features an advanced scheduler, to automate preset recall and make sure the correct preset is
triggered at any time.
These combined features make the Martin Audio Engineer an outstanding one-box problem solver for any
installation where high quality and no compromise operation are important factors.
Please take your time to read this manual carefully, as it will enable you to get the most out of the product.
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Before you start
The Engineer control software was designed to work with either Windows Vista, Windows XP or Windows 7
(32 bit). Although it might work with older version of Windows this isn’t officially supported.
You’ll need a computer that meets the following specifications to run the software:
•
Intel compatible Pentium IV class computer or better
•
At least 512Mb of system RAM
•
RS232 serial port or USB RS232 adapter with drivers installed
•
A mouse (scroll-wheel recommended)
Before you attempt to install the software please make sure no previous version is installed. You can check this
from the “Programs and features” function in the Windows Control Panel. If a previous version is installed,
please uninstall it by pressing the “uninstall” button here.
Also, be sure the Microsoft .Net framework version 2.0 or higher is installed. This is a freely available
framework which you can obtain from the microsoft.com website. If you don’t have an internet connection,
you can use the version included on the Engineer installation CD.
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Installation
To install the Martin Audio Engineer control software, simply insert the CD-ROM provided with the device. The
installation software will automatically start.
If this is not the case, please open the "My computer" dialog, located on your desktop or start menu. Select the
CD or DVD drive containing the Martin Audio Engineer software and double-click on the "Engineer.msi" file.
You should now see the installation wizard. Please follow the instructions on your screen to complete the
installation.
After installation, a new program group called "Martin Audio" will be available from the programs folder in
your start menu. To start using the Engineer software for the first time, simply click the Engineer icon located
in this group.
Uninstalling the software
In case you want to uninstall the software, access the “Martin Audio” program group in you Windows start
menu and select “Uninstall”. Alternatively, access the Windows Control Panel, select “Add/Remove programs”.
From here, select the entry for the Engineer mk2 control software, and press the remove button.
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Concepts and terminology
The Engineer was designed with a few concepts in mind, which we’ll try and explain in this chapter.
Presets, projects and the workspace
The Engineer can store up to 28 presets at one time. A preset is a predefined combination of settings you’ve
made, which can all be recalled simultaneously with a click of your mouse, using the remote control or the
built-in scheduler.
There are five types of presets:
•
Complete presets (default): This type of preset stores or recalls all available parameters, essentially a
complete snapshot of your current settings.
•
Routing presets: This type preset only stores or retrieves the routing settings and BassCreator settings
•
Input presets: Stores/retrieves all input settings (input eq’s and gains, simple engineer settings)
•
Output presets: Stores/retrieves all output settings (output gains, limiters, crossovers, output eq’s,
delay, phase)
•
Engineer presets: Stores/retrieves all advanced Engineer settings
To create a preset, you first have to make the settings you want from the currently active settings. This is
called the “workspace”, which always represents the settings currently on your screen and –when
synchronized properly- what you’re hearing.
When recalling a preset, its settings will copied to the workspace. If a partial preset is recalled, only the
settings defined in that preset are overwritten in the workspace; the rest of the active settings will not be
changed.
Any number of presets together with the current workspace form a project. A project is defined by the
complete content of an Engineer device stored at a given time. You can store a complete project to file (files
with the “epf2” extension) for later usage or for backup-purposes, which is something we recommend.
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Synchronization
Each time you start the Engineer control software you will be asked to synchronize the software with the
project stored on the Engineer itself. Synchronization is an important concept that ensures that whatever it is
you’re controlling from the software actually represents the settings stored on the device.
You should always synchronize before working on a project with an Engineer connected. The choice to skip
synchronization is available solely as a means of working on a project when the Engineer isn’t connected to
your computer.
Zones
One or multiple outputs on the Engineer can be grouped into zones. Zones allow you to define up to eight
regions in your venue for which you want to separately control the volume from either the remote control or
the software.
This way you save trouble of adjusting each output volume independently. Zones can be named, so they will
show up on the remote control and in the software in a convenient way.
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Security
Logging in
If you plan on using the Engineer mk2 Control Software for everyday use, you’ll want some way of preventing
incapable hands from controlling crucial system parameters that can potentially destroy an entire PA system.
The Engineer’s security features provide just this and offer a limited set of controllable settings for four
separate security roles, ascending from bar personnel to full blown audio experts:
Level
0
1
2
Role
Basic personnel
DJ
Local sound technician
3
Sound guru's
Allowed controls
Master gain (cut only), Engineer bass treble and gain, zone gains
Input gains, input EQ's, preset recall
Routing, zone setup, BassCreator settings
All output settings, full preset control, preset scheduler,
Password modification
Each level, except for the most basic one, is password protected and needs to be entered every time you
connect the Engineer to the computer. By default, only one password is defined, which gives you access to all
functionality. This is set to “MA” (case insensitive).
When connected, you’ll be presented with this dialog box, prompting you to enter the password that goes
with the level at which you wish to access the device. Selecting “Don’t log in” results in level 0 access.
You can also log in or out of the Engineer at a later time from the “Security” menu. Logging out sets the access
level to 0. When logged in at level 3, you can also change the passwords for each level from this menu.
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How it works
Features unavailable at the current access level are either disabled or hidden from the user. A good example of
this can be found in the preset menu: When right-clicking a preset with a level 1 account, a user will only be
able to recall the selected preset, while a level 3 user has more options at his disposal:
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Main control
On synchronization completion, you’ll be presented with the routing screen. This offers you a nice overview of
the features available in the device. Let’s take a look.
The routing matrix
The largest part of this screen is taken up by the routing matrix, which allows you to control the path you audio
signal will travel through the device. All available input channels are positioned to the left of the matrix, while
the outputs are shown at the bottom.
When connected to an Engineer, the device type (418 or 818) will be auto-detected, and the matrix will be
adjusted to the number of inputs.
When you press one of the nodes in the matrix you connect one of the inputs to the outputs on the bottom.
The route travelled by the signal is highlighted, with the enabled node coloured in green. At this point you can
adjust the volume of the signal by right clicking the node and adjusting the gain value.
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Effects channels
As you might have noticed, there are four extra channels available beneath the input channels. These are
return channels for the Engineer and BassCreator effects.
Since the BassCreator and Engineer are stereo effects, all routing towards the effect channels must be done in
stereo as well. You can use the large nodes between the routing matrix and input effects for this purpose. Just
like the mono-routed nodes, use the right mouse button to adjust the gain of a specific node.
You can route multiple inputs to the Engineer and BassCreator; the inputs will summed before they’re
processed by the algorithms and will come out merged. Use the stereo-node to the right of the Engineer effect
button to route its signal to the BassCreator effect.
Routing your inputs towards the effects channel doesn’t prevent you from using the unmodified signal
elsewhere: You can still route the unmodified version of the signal to a different target within the matrix.
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Labelling your channels
For efficient usage of your program without the hassle of having to remember which (numbered) output
represents the audio channel you want to control, we recommend labelling your channels. This can be done
easily from the routing screen by simply updating the text within the gray boxes beside each in and output
channel. The corresponding tabs in the program will automatically be updated with this name and all labels are
stored on the device for future usage.
Accessing functionality
Although the Engineer mk2 software is built as a tab-based interface you can access most of the effects within
the program from the main routing screen. Simply click any of the buttons within the routing overview to jump
to the tab it represents.
Input controls
Each input on the Engineer features an eight-band parametric equalizer plus gain adjustment possibilities.
These operate in a straightforward manner.
To access one of the input channels select the corresponding tab and channel sub tab or click its button within
the routing screen.
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The following types of EQ filters are available;







Bell filters
Low-shelving filters
High-shelving filters
Band-pass filters
Band reject filters (notch filters)
nd
2 order all-pass filters (affects phase only)
Filter bypass (no EQ)
The filter graph can be expanded by clicking on the right of the graph. The vertical scale can also be trimmed to
get the best view of your EQ using the ‘Zoom’ control.
EQ settings can easily be copied and pasted to other input or output channels with the Copy and Paste
buttons.
Output controls
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The output channel tab
All output settings are grouped on a per-channel base within the output tab. You can access this through the
output settings tab or from the main routing screen by pressing the corresponding button in the routing
overview.
Each output channel features an eight-band parametric EQ, crossover filers, polarity, delay and gain settings
and an output-limiter. The EQ and crossover filter settings can be switched from the top-right part of this tab.
A specific type of filter and the settings that go with it can be changed from the “filters” overview that can be
expanded and closed using the vertical bar to the right of this view.
The following types of EQ filters are available:







Bell filters
Low-shelving filters
High-shelving filters
Band-pass filters
Band-reject filters (notch filters)
nd
2 order allpass filters (effects phase only)
Filter bypass (no filter)
Crossovers can also be selected from a range of flavours:



nd
th
2 or 4 order Linkwitz-Riley (12dB/Octave or 24dB/Octave)
st
nd
rd
th
1 , 2 , 3 or 4 order Bessel (6dB/Octave to 24dB/Octave)
nd
rd
th
2 , 3 or 4 order Butterworth ((12dB/Octave to 24dB/Octave)
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To change the gain, Q/bandwidth/slope for each filter, use the numerical values next to the filter type. Double
clicking each value will pop-up a window in which you can use a slide bar to adjust the selected value.
Another option to change each filter’s parameters is by dragging each filter in the visual overview to their
position. Use the scroll-wheel of the mouse to adjust the selected filters Q/bandwidth/slope. While dragging a
filter to its place its specific effect on the EQ as a whole is displayed as an opaque region in the EQ graph.
To reset all filters to their default values, you can use the “Reset filters” option located on the right side of the
screen.
The filter overview also contains a “zoom” option you can use to zoom in or out from the graphical overview.
Beside this button, two buttons allow for copying and pasting from and to other output or input EQs.
The sum (final result) of the effect the crossovers and equalizer have together is displayed directly below the
tabs controlling them. You can choose to display additional channels and the colour they’re displayed in from
the “Channels” panel located on the right of this control (click to expand or collapse this section).
You may have noticed the checkbox allowing you to show the phase characteristics of all filters. Disabled by
default, this feature is meant for advanced users. Setting it to ‘enabled’ allows you to view the phase
characteristic of all filters or only the selected one (click and hold the left mouse button over the filter you
want to see).
You can double click each equalizer or crossover’s graphical representation to have a separate window pop up
that controls the same parameters. This can be left on top of all windows, so that you can control other
parameters while keeping this window handy on the same screen.
There are copy and paste buttons available for the crossover functions as well as the EQ, and the ones located
at the top left of the output channel tab which can be used to copy and paste all output parameters
simultaneously ;- gain, limiter, crossover and EQ.
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Output tab Save, Load, Copy & Paste Buttons
There is also a Save and Load button. These buttons are used for saving or loading all output parameters to a
file. This makes designing complex projects with different speakers on each output very simple indeed. The
Engineer Mk2 software installation file includes output files for most Martin Audio speakers which can easily
be loaded into any of the outputs.
If you need to create a custom output this can be saved to file and loaded into other outputs or in future
projects. Unlike saving output presets (see the chapter on Projects and Presets on page 34), the output Save
function does not save the channel location, just all the parameters so even if a channel setting were created
and saved in say output 1, the file can be loaded into any of the 8 outputs.
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Engineer algorithm concept
One of the main features of the Martin Audio Engineer is the Engineer algorithm itself. Think of the Engineer
algorithm as a real-life sound engineer whom you can tell what kind of sound you'd like from your sound
system.
The underlying technology is quite complex and for this reason the system has been split up into a simple and
an advanced mode.
The problem
First, let’s look at the reason why one might want to use the Engineer algorithm.
Say we have a situation where we have a venue (maybe a bar or a restaurant) with an MP3 playing machine
taking care of the music. We tell the machine to play us a lounge background program and the following
happens:

First we get a nicely produced music track, which has good dynamics and a proper mastering volume;
everything is fine and we set the total volume to the level we like it in the venue.

The next track is very quiet with very little bass and treble so suddenly the music in the venue has
disappeared, totally drowned by the noise of talking people. A little annoyed we turn the volume up
to the desired level and add some bass and treble until we reach the desired sound again.

Then suddenly a new song starts and this song is a very modern track which is mastered in such a way
that no dynamics are left at all. So suddenly the music feels 8 times as loud as you intended it and
everybody in the venue is putting their fingers in their ears and looking annoyed because the massive
amount of bass in the venue vibrates their drinks off the tables...
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This example describes a very common situation which we see happening every day in venues all over the
world. This problem is actually not anybody’s fault; it’s just the way things evolve through the years and the
result of different opinions of how things should sound. But it is a problem that we have to deal with.
On way to overcome this problem is what we call the ‘radio station solution’. What happens at a radio stations
is that very strong multiband-limiting is applied to all program material, so that every song will sound the same
and is as loud as the rest, no matter if it is a “middle of the road” ballad or a techno track.
This technique works, but the drawback is that the music loses all it’s dynamics, large amounts of harmonic
distortion are added and the carefully mixed material is loses it’s balance completely (hey, I didn’t know that
the tambourine in this song was louder than the lead vocal….). See the resulting waveform from our example
treated with the “radio solution” in the picture below.
The best way to overcome these problems is to have a real-life flesh and blood sound engineer standby 24-7.
This way we would always have someone monitoring the program material who would fix every change in
loudness or tone immediately. Naturally this solution is way too expensive for 99% of the venues.
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The solution
We’ve solved the issue described above for you by creating an algorithm that reacts in the same way as a
normal sound engineer would do, hence the name ‘Engineer’. The Engineer works with human-based
perceptive algorithms which react the same way as a normal human being would. This means that the
algorithm reacts to perceived loudness instead of electrical loudness, so that songs with a lot of compression
(which sound loud), will be turned down more than more dynamic songs, so that the overall perceived level
stays intact.
The Engineer algorithm features an automated volume control, an automated low EQ, an automated high EQ
and a multiband end-stop limiter to catch extreme peaks in the program material.
Just like a normal human being would, the algorithm listens to the incoming signal for a couple of seconds,
then decides if it sounds too loud or too weak, adjusts the volume, listens to the amount of bass and treble in
the material and, if necessary, changes it.
If the volume of the material has a sudden large boost in volume (for instance when a DJ is fooling around),
these peaks will be handled by the end-stop limiter so that the algorithm has the time to slowly lower the
volume.
The picture below is the output of the engineer algorithm with our example input. In this picture we see that
the level and tone differences have been solved in an elegant way without destroying the dynamics or adding
distortion, and that the last piece of heavily compressed music has been lowered in volume to give it the same
perceived volume.
Engineer advanced configuration
The default Engineers settings give a good general purpose operation but all operational parameters can be
fine-turned in the Advanced tab to match the operation to a specific style of music or whatever response you
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might need. Please make sure to read this chapter of the manual if you plan to use the Advanced mode as it
will help you get the most from this feature.
The Engineer features three automated controls; an automated volume control and two automatic EQ’s. It also
features three end-stop peak limiters.
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The big picture
Before attempting to configure the algorithm, let’s take a look at the main parameters that will come into play.
The figure above gives us an idea of the problem to solve and the tools at our disposal: The blue line
represents the input volume offered to the algorithm; the red line depicts the overall volume we would like as
the output volume.
The goal is to modify our input volume in a way it will be in between the orange lines marked “Tolerance” by
the time we’re done. The tolerance can be set as an offset to the desired target level. If our virtual sound
engineer has low tolerance, he’ll try to match the target level as accurately as he can: The higher the tolerance,
the more slack will be allowed in the source level.
But when to intervene? Sometimes the source level will only be outside of the target area for a short time. The
maximum amount of time this is allowed to happen is set by the reaction time. Setting this to a short period of
time will result in a nervous engineer, turning the knobs as soon as the volume deviates from the target we’ve
set: The longer the reaction time, the more “lazy” our engineer will become.
You might be thinking you’ll want to set the reaction time as short as possible to counter sudden peaks in the
volume, but there’s no need: Sudden peaks in the source volume are countered by three limiters (low-, midand high tones). The purple line marked “headroom” shows us the maximum level at which these peaks are
allowed before these limiters kick in.
Finally, we need to account for situations in which no music is being played. A human engineer wouldn’t turn
up the level to 10 when there’s (almost) no input, so neither will ours. You can set the minimum level he’ll
work with; it’s called the threshold and marked in green in the figure above. If the input level’s below the
threshold, the engineer will sit back and relax: All knobs will be set to 0, leaving the source signal unchanged.
Now that we have an idea of what we’ll be configuring, let’s get started!
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Determining the source frequency range
Each of the automated controls has its own domain of operation: The leveller takes care of the overall volume;
the automated EQ’s take care of the treble and bass.
The frequency domain you want each of these controls to work their magic on can be determined by setting
their respective frequency range. Typically, you’ll want to adapt this setting to the type of music you’ll be
playing most.
We recommend setting the automated volume source frequency to the same values that are used in the
automated EQ’s. Common settings for different types of music:




Dance: 100 Hz - 4 KHz
Rock: 150 Hz - 4 KHz
Classical: 100 Hz - 4 KHz
Blues, Jazz: 120 Hz - 4 KHz
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The three end stop limiters have a frequency range that’s determined from the frequency range you entered
for the automatic EQ’s. In the figure above you can see how they correspond to these frequency ranges.
Setting the Autocatch
Remember the target level we discussed on the last page? We haven’t talked about the way this is determined
yet. To set this to level, we’ll need to use the “Autocatch” feature.
The Autocatch determines the treble and bass content we want our Engineer to look for. In other words: His
personal preference when it comes to a specific “feel” to the sound he’s creating.
As we would with a human sound engineer, we’ll need to let him hear what we’re looking for. So, put on your
favourite song and make sure it’s a good example of the music you’ll generally play. Ensure the music you play
is continuous and doesn’t contain any breaks, in particular, if it has vocals ensure you wait until the vocalist
starts singing before pressing Autocatch.
Now, before pressing the Autocatch button, make sure our engineer hears the source playing your track, by
routing it towards the engineer. Also, make sure your input settings aren’t interfering with the signal (no
extreme EQ or input gain settings).
To ensure the engineer is hearing the same as you are we recommend routing it as pictured below, assuming
you’ve connected your source to inputs 1 and 2.
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When you’re satisfied with the sound you’re hearing, press the Autocatch button in the top-right corner of the
Engineer advanced screen. It’ll remember the sound you want for this preset. You can set different values for
the target bass and treble in each preset, so you might want to create separate settings for different types of
music.
Please note, that every time you change any of the source frequency parameters (discussed on page 23) the
Autocatch needs to repeated!
Max cut, max boost and the correction indicators
To help you find the perfect settings for your situation, we’ve added a handy indicator that visualizes what’s
happening within the device.
This indicator is displayed for the overall level correction (Automated volume) and low- and high tonal
corrections (Automated EQ’s Low/High). It shows some of the most important parameters:
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

The max-boost is the amount of gain you allow your Engineer to add to the input level to reach the target
level you set using the “Autocatch” feature.
The max-cut is the amount of you allow your Engineer to deduct from the input level to reach the target
level you set using the “Autocatch” feature.
Together these two form the boundaries in which the Engineer functions: If you want to give it maximum
control over the source material, you should set them as high as possible: Setting them to lower levels
restrains the engineer from tampering with the controls too much.
In the case of the leveller there’s no maximum to the amount the Engineer can cut. This way, no matter how
loud a crazy DJ’s input signal is offered, it will always be cut to the maximum level you allow it to be.
The space you allow the Engineer to do its work in is marked in light gray on the indicators. The blue bar
indicates how far the engineer is currently turning the knob and this value in dB is shown beside the arrow on
the right. In the picture above he’s adjusted the source level by –1 dB in order to match the target sound we
defined.
In case the engineer determines an amount of gain should be applied outside of the max-boost/cut
boundaries, it will be clipped at their maximum values.
Correction speed, reaction time and threshold
Another important factor in the operation of the Engineer is the speed in which the input level is corrected.
This is determined by the correction speed: the maximum amount of dB’s per second you allow your sound
engineer to correct the source signal towards the target level. In other words: The speed with which the
controls are turned up or down.
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But when should the algorithm start to correct the input level? In some cases you might not mind small
variations in the level, or will want to allow for short periods of loudness. This can be set by the reaction time
and tolerance.
These parameters do just what their name suggests: The reaction time is the time in seconds a louder or softer
level will be allowed, after this your engineer will kick in and correct the signal. The tolerance is the maximum
amount of variation (either boost or cut) in dB’s you want to allow for.
A problem that could arise while the engineer is at work, is a sudden pause or unusually soft passage in the
music. We wouldn’t expect a human engineer to turn up the level in this case either, so we need a certain
threshold for the engineer to start working. This is set in dBFS.
Peak limiters
Sudden level changes are countered by the three peak limiters, so you won’t have to account for this when
setting the reaction time and tolerance. The peak limiters can be separately set for the low, mid and high
tones. They work like any normal limiter you’re used to.
Each limiter allows for an amount of “headroom”, which – again – allows you to tolerate peaks up to a
predefined level. The attack is set as a factor of the release time.
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Exit equalizer
Still not satisfied with the results you’re getting? The Engineer allows you to make some final adjustments
before the routed signal movies on. You can use the exit equalizer for this purpose. Press the “Edit in new
window” button to open it up.
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Engineer simple control
Of course, the settings made in the Engineer Advanced overview aren’t suited for day to day usage. For this
purpose, a simple control centre can be found from the “Engineer” tab. It contains only three settings that
should look familiar to anyone: A slide for bass, one for treble and an overall volume slide.
The level indicators to the right depict the stereo in and output levels for the Engineer. The Engineer Simple
control is available from access level 0 (meaning to anyone).
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Basscreator algorithm
Concept
The Basscreator algorithm creates a virtual bass based on the "lost fundamental" principle: It creates a range
of higher harmonics of a narrow frequency band around a used specified centre frequency. This is a psychoacoustical effect that fools your brains to think something is going on in the bass frequency range. There are
numerous advantages to the algorithm, you can:





Replace some of the original bass in the signal with virtual bass to avoid noise emissions problems.
Beef up small speakers to give a sense of low end that couldn't be achieved normally on the same
speaker
Reduce the amount of sub-woofers needed to save space and money
Use the Basscreator for infill systems to maintain a consistent sound field with the added advantage
of avoiding interference problems with the main systems sub-woofers (the perceived bass is in a
different frequency range)
Use the Basscreator on small line-array systems to bring the bass in the frequency range where the
line-array is actual capable of behaving as a line-array.
The pictures below give an impression of what happens within the Basscreator algorithm. If we put in a sine
wave with a frequency of 50 Hz and we put the output of the device in an analyzer, we see the sine wave as a
single spike.
Now if we put that same 50 Hz sine wave through the Basscreator algorithm and analyse the output of that we
see the picture below. We see that the original 50 Hz sine wave has been replaced with higher harmonics on
100,150,200 and 250Hz in a certain ratio. To our brains, this harmonic pattern will “sound” as if there was a 50
Hz tone present.
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Controlling the Basscreator
To start using the Basscreator you should first route the inputs you want to use it on toward the Basscreator
module in the Routing tab. Then select the Basscreator tab to control its settings.
First, select the frequency you want to set as the perceived bass. The best value for this setting depends on the
genre of music you'll be playing most regularly and the size of you speaker system.
A rule of thumb for this is to choose the frequency about one octave below the low cut-off of your speaker.
This means that if you have a speaker which is capable of producing 100 Hz, you should use the 50HZ setting
one the Basscreator as a starting point.
If you have set the frequency, set the drive and mix levels. The drive level determines the amount of
harmonics generated by the algorithm and determines the sound it will produce for a large part. The mix level
sets the amount of added effect (the amount of virtual bass added to the original signal).
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Presets and projects
If you’ve experimented with the software already, you’ve probably noticed the preset overview fixed in the
top right of the window. This allows you to store and retrieve up to 28 presets of five different types on the
Engineer.
The preset type you’ll probably use most is the “complete” type. This stores all settings you made in the device
into a preset. This means all settings can be recalled at will.
The other presets are partial presets:
 The input preset stores all input EQ settings, input gains, input mutes and simple engineer settings.
 The output EQ preset stores all output EQs, output crossovers, output limiters, delays, limiters and
phase settings
 The routing preset stores the way the device is routed as well as the BassCreator settings.
 The Engineer preset stores all settings in the Engineer advanced tab.
You should consider the operation of Presets before making a decision on which type to use, don’t use a
Complete preset for example is there is any likely hood of having to make changes in the future, particularly if
your project has many presets. Say for example you need to go back and make some subtle changes to the
output EQ a couple of weeks after a venue has opened to fine-tune the sound. When you make the changes
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you will have to update every single preset or the sound will revert back to the original settings when the
presets are recalled. If the presets you need are routing and level changes, consider using a routing preset,
don’t forget that routing nodes can also have gain changes, these are also recalled in a routing preset.
Separate presets can be saved to file, or imported from them. A combination of presets (everything stored in a
device at one time) is called a project. A project can also be saved or loaded from file. This is done from the file
menu.
When you load a project from file, you’ll be asked to synchronize. This is highly recommended. If you want to
know why, please see the concepts chapter for more information about synchronization.
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Linking channels
Each input and output can be linked into a stereo pair. This means channels 1 and 2, 3 and 4, and so forth can
be controlled as one. To use this option select the “Stereo link” tool from the edit menu in the program’s
toolbar.
From here, you can select each channel you want to link. As soon as you hit “Apply” or “OK” each second
(even) channel will start using its partner’s settings. This can result in sudden changes in outbound signal
levels, so take care not to damage any equipment.
Once linked, each channel’s tab page will reflect its linked status: The names of both channels will appear as
the title, and all settings made will reflect on both channels. Only the output mutes can be controlled
individually.
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Zoning output channels
The Engineer allows you to assign output channels to up to eight zones. For each zone the volume can be
adjusted, affecting every channel assigned to it. This way, you can separate different regions of your venue and
assign volumes accordingly, using either the software or the remote control (see the remote control chapter
for further information).
Zones can only be assigned when logged in at security level 3. The zoning manager can be accessed from the
zoning tab or direct from each output tab, where a small panel in the bottom left indicates the current
output’s zone.
By default, output channels aren’t assigned to any zone but are shown lined up under “Unassigned Channels”.
To assign an output to any of the zones simply click on the output box and drag and drop to the zone of your
choice. You can quickly and easily make changes by dragging and dropping the boxes between zones or back
down to the “Unassigned channels” area.
To name each zone, click on the zone names down the left side.
To manage each zone’s volume, adjust the zone master gain value. This determines the maximum level for
that zone. The volume control available on the remote can adjust the volume between this value and “off”. It
cannot make the zone louder than your gain setting.
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Daylight saving
The Engineer offers the possibility of automatically adapting to daylight saving time changes. The time and
date daylight saving starts and stops differs per country, so you will need to let the device know when to
update its time accordingly.
This can be done from the “edit” menu in the application’s top menu bar, available from the highest security
level (3) only.
When clicked, a window will open up allowing you to adjust the daylight savings setting.
By default, daylight saving is disabled. To enable it, check the box at the top of the window and enter the dates
and times for daylight saving begin and end. The calendar icon to the right of each input field pops up a
calendar that allows you to easily select the date.
When daylight saving starts, the clock on the engineer will be adjusted forward by one hour, and when it ends
the time will be adjusted back.
The dates and times can be set to their default for the current year according to the locale used in Windows.
Use the “Default” button to load these settings. Pressing “Cancel” will do just that on any changes made and
close the window, pressing “Ok” will apply your new settings and close the window.
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Scheduler
The Engineer features an advanced scheduling system, allowing you to adjust your venues sound set-up
automatically at any given time, or plan one-time changes in advance.
The system is based on preconfigured presets that will be triggered at any point in time that you define. This
can be daily, weekly, or one time only. To start using this feature, create the preset you require for each event,
and select the scheduler tab.
From the calendar on the left, you can select one or multiple dates on which to add a new scheduled event. If
you’re planning to use a daily preset, you only need to select one day.
To add an event to the Engineer’s agenda, all you need to do is specify the preset to use, the time to use it, and
the recurrence.
When you press add you’ll notice an icon appearing on the selected day. This indicates an event is scheduled
for that day. There are different icons for each recurrence setting, which should be quite easy to understand.
To view planned events for a specific period of time, just select the date range you wish to show. All planned
events will appear in the panel at the top right corner. To delete a single event, right click it and press
“Remove”. You can also delete all selected events by selecting “Remove selected items”.
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Limiter overview
So, you’ve got everything set up the way you want it? All there’s left to do is disconnect your computer and sit
back and relax. If set up properly, your automated sound engineer will be doing all the work for you.
Just in case you want to use the software to keep an eye on things, there’s a tab page available showing you
the limiter status of all eight output channels. Together with the in- and output level indicators, which are
always visible, this is a handy overview to show you when one of the limiters kicks in.
From security access level 2, all limiters can be controlled from this page, on lower levels it just shows the
status of each. Linked limiters show up in faint red, indicating they can’t be adjusted.
In the example below, output four has been linked to output three, and output one’s limiter is active.
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Preferences
The Engineer Control software offers two user-configurable settings, which can be changed from the
preferences dialog. You can open this dialog from the “edit” menu in the program’s toolbar.
The first option you can select in this dialog is the render quality. This affects the quality in which the
program’s graphics will be drawn to your screen, most notably the graphic representation of the equalizers
and crossovers.
By default, this option is set to “High quality”. Most modern day computers are more than apt to handle high
quality graphics without sacrificing much performance. If, however, you experience any lag in using the
software, you might want to try setting this option to “high performance”.
Secondly, the filter selectivity can be switched between Bandwidth per octave or quality factor (Q). This affects
the units that will be use to express each filter’s response slope. By default, this is set to Bandwidth/Octave,
we would suggest changing this to Quality Factor as this is the standard that Martin Audio use for all published
parameters. Note that once changed, the Engineer software will remember your preference and it will always
start with your selection every time you open the application.
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Usage tips
Here are some general tips on using the software:
 Double click any of the numeric values to have a slider bar pop up that lets you adjust values fast
 Right click the routing nodes to apply a gain adjustment at that point. This also works with the large
stereo nodes on the inputs.
 Double click any of the graphical equalizers to have a separate version of it pop up in a new window.
This way, you can keep the equalizer handy while accessing other parameters
 Use the “Stereo linker” option from the “edit” menu to link in- and output channels
 All parameters in a specific output channel can be copied and pasted using the copy/paste buttons
beside the channel’s name on the tab page. Eq’s can be copy from the right side of their controls.
 To use a single preset in multiple projects, use the import and export function below the preset panel.
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Frequently asked question
Q: What are the default passwords?
A: By default, only one password is used, which offers access to all functionality. Using this password you can
change the passwords for all access levels. The default password is: “MA” (not case sensitive).
Q: I forgot my password! Please give me the master password.
A: There is no master password. If there was, it would spread amongst users in no time. A publicly known
master password defeats the purpose of using passwords for security.
So write down your password(s) somewhere and put them in a safe place. If you lost them, contact your
dealer.
Q: My computer won’t connect to the Engineer, how do I solve this?
A: First, check to see if the comport you selected in the software isn’t used by any other application on your
computer and make sure you close all of them. Don’t forget some of these programs can be working silently in
the background. If you’re not sure about this, (temporarily) uninstall the program.
Also, make sure you’re using the serial cable provided within the package. Check to see that the port you
selected in the software is the physical port the cable is connected to.
If this didn’t help, try running the software from a different computer. If it’s working here, chances are the
serial port on your computer is broken. If you’re sure it’s not, please contact us.
Q: Will version X of the software work with version X of the Engineer hardware?
A: The Engineer control software will attempt to detect the version of the hardware you’re using. In most
cases it will let you know if it’s incompatible with the hardware you’re using. If you’re using an older version of
the Engineer 418 you can try using version 1 of the Engineer control software. Download it at:
http://www.martin-audio.com
Q: The software is performing badly on my computer. Can this be fixed?
A: For older computers, you might want to take a look at the render quality setting that can be found in the
preferences dialog (see page 41 for more information).
Generally speaking, Microsoft Windows installations that have been in use for a long time or are clogged with
unused installed software tend to perform badly. A fresh Windows installation can work miracles in this case.
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Q: I’m getting pop-ups with error messages; the software hangs or even crashes. What to do?
A: The first thing to do is to check if you have the Microsoft .Net framework version 2.0 or above installed. You
can get it from the Microsoft.com website. If this doesn’t resolve the issue, please reinstall the latest version of
the Engineer software.
If the problem still remains, please let us know, so that we can fix the issue. Please include as much
information as you can: The version and language of your Windows installation, how the error can be
reproduced and – if relevant – a screenshot of the error. We’ll do our bests to correct the problem.
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Preset and Zone Communication Protocol
Introduction
As mentioned previously, the Engineer 418 and 818 can form part of a more complex system controlled via
either the RS232 port on the front or the RS485 port on the rear of the device, taking the place of the Engineer
remote. Systems such as AMX and Crestron can be programmed to control the same functions as the Engineer
remote; recalling presets, selecting zones and adjusting the zone volumes. This chapter describes a part of the
communications protocol used on the Martin Audio 418 and 818 v1.0.
Implementation of this protocol should only be done by professional installation engineers. Improper use can
result in device instability or, ultimately, device crashes. In this case, the firmware will have to be flashed
which will result in the loss of the project stored in the Engineer.
For this reason, it's recommended to backup your data before trying your protocol implementation. You can
do this from the Engineer control software, using a full downsync. Save the result to a file. If anything goes
wrong, try uploading this file into the device. For more information, please consult the official Engineer
software manual.
Connecting to the Engineer
The protocol described in this document can be used for both the RS232 (front) and RS485 (back) connections
on the device. Communication with the device is established with the following settings:
Baud rate: 19200
Data bits: 8
Parity: None
Stop bits: 1
Handshaking: RTS during send
Note that the RTS pin should be set to “on” a few milliseconds prior to the actual communication. Always
reset this pin to “off” when communication isn't taking place!
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Recalling presets
Preset recalls work on an index basis. This means you'll need to know the preset number you want to recall.
You can check out the index that goes with each preset using the Engineer control software's preset
management window:
Downsync your project first, then hover your mouse for about 3 seconds over any preset in the preset
manager. The index will then be shown in the preset information.
The preset index used in previous versions of this protocol has now been deprecated: The preset type will be
automatically selected by the engineer when recalled. Therefore we can use a value of 0 for this parameter.
Now that you have these two parameters you can construct the information package required to recall a
preset. This package has the following syntax:
Byte index
0
1
2
3
4
5
Data
254
14
Preset index
0
255
Checksum
The “checksum” field's purpose is to ensure no data is lost during transmission. It's defined as follows:
Checksum = (254 + 14 + preset index + preset type) & 127
The “&” character in this calculation is a “binary AND” operation. If this calculation exceeds the range of one
byte (when the value's exceeds 255), the most significant bit is discarded.
An example: If we would want to recall a preset at index 2, the checksum would be:
254 + 14 + 0 + 0 = 268
checksum = 270 & 127 = 12
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To recall this preset we would now do the following:





Open a connection to the device
Set the RTS pen
Wait for 10 ms
Send package 254 14 0 0 255 12
Reset the RTS pin
Setting master- and zone volumes
Zone volumes can also be set using their respective index. As with the preset recalls, you can determine which
zone corresponds to a certain index from the Engineer control software:
In this example zone 1 is named “Dance Floor” and has outputs 1, 2 and 3 assigned to it which are labelled
“Sub”, “WT3 L” and “WT3 R”. Zones are indexed from 136: Zone 1 corresponds to index 136, zone 8
corresponds to index 144. The master volume's index is 84. These indices are referred to as “node-index”.
Gain values in the Engineer are indexed from -45 dB to +15 dB in steps of a quarter of a dB:
Index
0
1
2
Gain [dB]
-45.00
-44.75
-44.50
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....
180
0 dB
...
239
240
+14.75
+15.00
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The third variable in our information package is the checksum, which is defined in the same way as described
above: The sum of bytes 0 to 3 combined with a binary AND calculation with 127.
The gain information package is defined as follows:
Byte index
0
1
2
3
4
5
Data
254
12
Node index
Gain index
255
Checksum
Again, an example. If we want to set the gain for “Zone 1” (defined as “Dance Floor” in the screenshot above)
to -2 dB, we construct our package as follows:
Node index for zone 1 = 136
Gain index for -2 dB = 172
Checksum calculation:
254 + 12 + 136 + 172 = 574
Checksum = 574 & 127 = 62
To set the volume for zone “Dance Floor” to -2 dB we would now do the following:





Open a connection to the device
Set the RTS pen
Wait for 10 ms
Send package 254 12 136 172 255 62
Reset the RTS pin
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9: Engineer 418/818 Specifications
Mechanical
Size (physical), WxHxD
Weight (physical) (NS12P) Ingress protection rating -
-
(W) 483mm x (H) 44mm x (D) 251mm
(W) 19inch (H) 1.75 inch (D) 9.89inch
3.35 kg. (4.35 kg. Shipping)
IP20
Electrical
Input voltage, frequency
Power rating
Fuse
Internal battery
-
100-240V AC 50-60Hz
30 Watt
630 mA SlowBlow, 20 x 5mm
5,5V goldcapp
-
0-45 deg. C
-10 – +60 deg. C
10-90% (non condensing)
2400m max
6000m max
-
12-pin Phoenix plug-in terminal block
12-pin Phoenix plug-in terminal block
9-pin DB9-F connector
RJ-45 connector
3-pin IEC power plug
Environmental specifications
Operational Temperature
Storage Temperature
Humidity
Operational Altitude
Storage Altitude
Connections
INPUTS
OUTPUTS
RS-232
RS-485
POWER
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Audio
INPUTS
IMPEDANCE
CMRR
OUTPUTS
SOURCE IMP.
MIN. LOAD
MAX. LEVEL
FREQUENCY RESP.
A/D DYNAMIC RANGE
D/A DYNAMIC RANGE
IN-OUT DYNAMIC RANGE
DISTORTION
MAXIMUM DELAY
-
electronically balanced
> 25k ohms
> 70dB 20Hz-20kHz
electronically balanced
< 60 ohms
600 ohm
+20dBU
+- 0.1dB 8Hz – 20 kHz
> 115dB Unweighted
> 112dB Unweighted
> 110dB Unweighted
0.0035% @1kHz 0dBU
10ms. /output (increment 2 microseconds.)
-
24 bits
48 kHz
32 bits floating point
-
adjustable +12dB to –inf.dB in 0.25dB steps
adjustable +12dB to –inf.dB in 0.25dB steps
-
8 sections per input, 8 sections per output
Bell, Lowshelf, Highshelf, Notch, Bandpass
+12dB to –45dB in 0.25dB steps
User selectable 0.05 to 20 / 20 to 0.05
20Hz – 20kHz
Processing
AD/DA resolution
AD/DA sample rate
Internal processing resolution
Software
OUTPUT GAIN
INPUT GAIN
Parametric Equalisation
FILTERS
FILTER TYPES
FILTERGAIN
FILTER Q/BW
FREQUENCY
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High-And Lowpass Filters
FILTERS
FREQUENCY
RESPONSE
-
One of each per output
20Hz – 20 kHz
Bessel, Butterworth, Linkwitz-Riley 12/18/24 dB/oct
-
+20dBU to –43 dBU
½, ¼, 1/6, 1/8 times the release time
49ms to 2000ms
-
freely insert-able on any output
virtual 30Hz to 120Hz
drive, mix level
-
freely insert-able on any input
-45dB to +22 Db
-
system, routing, noise emission, engineer
28 user-accessible presets
-
3 security levels with user assignable passwords
security settings are stored within the device
Limiters
LIMITERS THRESH.
ATTACK TIME
RELEASE TIME
Basscreator Algorithm
PLACEMENT
FREQUENCY RANGE
PARAMETERS
Engineer Algorithm
PLACEMENT
OPERATING RANGE
Presets
PRESET TYPES
PRESET NUMBER
Security
LEVELS
STORAGE
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