Yamaha | AD8HR | Remote Control of Yamaha Mic Pres with 6416Y2 and VDCs

Application Note
Aviom-Yamaha Digital Snake
Remote Control of Yamaha Mic Preamps with the 6416Y2 and VDCs
Aviom 6416Y2 A-Net® Cards and 6416dio Digital I/O
Modules can be combined with Yamaha® digital consoles
and AD8HR mic preamps to create a powerful, high fidelity digital snake. With Pro64® A-Net as the backbone, the
system is quick to set up, simple to use, and easily scaled
as additional split locations are required. Using the integrated Virtual Data Cables™, control data for the AD8HRs
can be passed directly from the console control surface to
the preamps, using the same network infrastructure as the
digital audio.
System Overview
On stage, each AD8HR provides 8 mic inputs and can operate
at 44.1/48kHz or 88.2/96kHz. Audio is output as AES3 digital
data, which is compatible with Pro64 6416dio Digital I/O
Modules. Each 6416dio has 16 channels in and 16 channels
out, so one 6416dio is required for every two AD8HRs used.
At 44.1/48kHz, up to 64 channels can be input into the Pro64
network; at 88.2/96kHz, the maximum is 32 channels.
At FOH, the Yamaha digital console (DM2000, M7CL, PM5D,
etc.) will be populated with 6416Y2 A-Net Cards. Each 6416Y2
supports 16 channels in and 16 channels out at 44.1/48kHz
and 8 channels in and 8 channels out at 88.2/96kHz. (Note that
this is a limit of Yamaha’s MY card slot not the Pro64 network
or 6416Y2 card itself.)
Control data (RS-422) for remote control of the AD8HRs can
be passed directly from the console into the Pro64 VDCs at
FOH. Back on stage, the control data is output from one of the
6416dio modules to DM1000
the AD8HRs.
P Note: While the 01v96 and 02R96 digital consoles are
compatible with the 6416Y2 card for digital audio I/O
routing, no provision for controlling remote preamps
via RS-422 is available on these consoles
295
+48V
96kHz
88.2kHz
48kHz
44.1kHz
HPF
+48V
MASTER
dB
OFF ON
WO RD CLOCK
+48V
96kHz
88.2kHz
48kHz
44.1kHz
HPF
+48V
MASTER
dB
OFF ON
WO RD CLOCK
+48V
96kHz
88.2kHz
48kHz
44.1kHz
HPF
+48V
MASTER
dB
OFF ON
WO RD CLOCK
635
+48V
96kHz
88.2kHz
48kHz
44.1kHz
HPF
+48V
MASTER
dB
WO RD CLOCK
OFF ON
AES3
A-Net
486
Sample stage rack (LEFT) with 32 channels of mic preamps connected to 6416dio Digital I/O Modules. A single Cat-5e cable is
used to connect the stage rack to the console (RIGHT).
1157 Phoenixville Pike, Suite 201 • West Chester, PA 19380
Voice: +1 610.738.9005 • Fax: +1 610.738.9950 • www.Aviom.com
Application Note
Extending the Network
Remote Control with VDCs
Expanding the functionality of the Pro64 system beyond the
stage-to-FOH snake is as simple as connecting additional
Pro64 I/O modules. The following Pro64 devices can be used:
Pro64 Virtual Data Cables can be used to send control data
right from the console to the AD8HR preamps. Most consoles output the control data through a rear panel serial port
labeled “REMOTE” using RS-422. Getting that data into the
Pro64 network requires connecting a short straight-through
DB9 cable (also referred to as a serial cable) from the console
to the RS-422 port on the 6416Y2 card. A second DB9 cable
is used to connect the RS-422 VDC port on a 6416dio to the
Yamaha mic preamps being controlled. Only one 6416Y2 and
one 6416dio will be involved in the remote control interface.
• 6416dio Digital I/O Modules for digital splits
• 6416o Output Modules for analog splits
• 6416Y2 A-Net Interface Cards for console-toconsole connections
• the ASI A-Net Systems Interface module for
outputs to Pro16® Personal Mixers or output
modules
Setting up the Network
Configuring the audio in the Pro64 network is no different
for this application than any other Pro64 system: each module (or card) must have a base Slot set and input and output
channels must be activated as needed. Refer to the 6416dio
and 6416Y2 User Guides and the 6416Y2 Quick Start Guide for
more information.
This system utilizes the added functionality of controlling the
mic preamps remotely using RS-422 over the Pro64 network,
and that communications pathway must be configured before
data can pass between the devices over the network. Additionally, because this system uses multiple digital devices, the
digital clock structure must be configured correctly on each
digital device. Both steps are straightforward and are detailed
below.
B
RS–232/422
AES3 I/O CHANNELS 9–16
Some consoles, such as the LS9 series, provide the remote
control data right on the backplane for the card slot, eliminating the need for the external RS-422 DB9 jumper cable at the
console. A cable will still be required to connect the 6416dio
RS-422 port to the AD8HR preamps, however.
This diagram shows a DM1000 console with one 6416Y2 card installed
connected to a 6416dio Digital I/O Module and an AD8HR mic preamp. RS422 is connected between the DM1000 and the 6416Y2 card and between
the 6416dio and the AD8HR. Remote control data travels over a pair of
Virtual Data Cables.
STEREO LINK
AUTO CLK
Multiple Yamaha mic preamps can be controlled using this
method by daisy chaining the RS-422 connections from one
AD8HR to the next; each preamp is assigned a unique ID and
can be addressed separately from within the Yamaha user interface. Note that daisy chaining multiple RS-422 connections
requires a specially wired cable, as specified in the Yamaha
documentation.
A
ON
6416Y2
P note: In a straight-through cable, pin 1 is connected to pin
1 on each end of the cable, pin 2 goes to pin 2, etc. Do
not use a crossover cable or null modem cable for this
application.
CTL
ERR
AES3 I/O CHANNELS 1 –8
6416 dio
DIGIDESIGN / TASCAM COMPATIBLE
Digital I/O Module
YAMAHA
AC POWER
1 AMP
PIN 1 = GND
PIN 4 = 24VDC
FUSE: 250VAC- F4AL
BACKUP POWER
COMPATIBLE
B
VIRTUAL DATA CABLE PORTS
GPIO INPUT
IN
UP = ISOLATED
DN = TTL
RS-232 /422
1– 8 PORT SETUP
9, 11 RESERVED
1 2 3 4
1
2
3
4
IN
10 CTRL MASTER
12  232 / 422 
ON
OUT
WORD CLOCK
A
OUT
75Ω
TERMINATION
Remote Control of Yamaha Mic Preamps with the 6416Y2 and VDCs
2
Application Note
odd-even pair of VDC Slots can be used. Consult the 6416Y2
User’s Guide for more information.
The first step is to configure the 6416Y2 card correctly before
loading it into the console or powering up the console. The
Yamaha devices communicate using RS-422 at a 38.4k baud
rate, with 8 data bits, 1 stop bit, and no parity. The internal
DIP switches highlighted below illustrate the switch positions
to match these settings on the card. Note that any available
Configuring the card to receive control data from the backplane is the same (required for the LS9 series consoles), but
use the switch block marked “SW3” for baud rate and set DIP
switch 2 in SW8 up for RS-422.
RS-422 - front
RS-422 - backplane
Configuring the Card and the Console for
Remote Control
MY16 Mode
VDC Slot 1-2
SW7
DIP switch handles are shown in black.
ON
1 2
3 4 5 6
SW8
7 8
9 10
Baud Rate - backplane
(LS9 series)
ON
ON
1 2
1 2
3 4 5 6
3 4 5 6
SW9
7 8
SW3
7 8
9 10
Baud Rate - front panel DB9
ON
ON
1 2
1 2
3 4 5 6
7 8
SW4
3 4 5 6
7 8
SW1
ON
1 2
SW2
3 4 5 6
7 8
VDC 1-2 are set to transmit/receive RS-422 control data at the 38.4k baud rate from the external control port. Set the DIP
switches on SW4 for the front panel connector or on SW3 for consoles such as the LS9 series that use the backplane connector.
After loading the card into the console and connecting the
DB9 cable if necessary, be sure the console’s RS-422 data rate
is set for 38.4k baud. (See the documentation that came with
your Yamaha product for additional information on changing
its control data communication parameters.)
VDC Configuration
RS-422
ON
6416dio rear panel DIP switches (shown in black) configured for
AD8HR remote control data; set DIP switch #12 up for RS-422.
Configuring the 6416dio for Remote Control
The next step is to configure the VDCs on the 6416dio which
will be passing control data to the AD8HRs. Connect its
RS-232/RS-422 port to the first Yamaha mic preamp with a serial DB9 cable. Set the port to RS-422, 38.4k baud, 8 data bits, 1
stop bit, and no parity (shown at right). Activate the same VDC
Slots that were activated on the 6416Y2.
Remote Control of Yamaha Mic Preamps with the 6416Y2 and VDCs
Finally, connect additional Yamaha mic preamps by daisy
chaining the RS-422 connections. This requires a special DB9
cable, as specified in the Yamaha documentation.
At this point changes to mic pre parameters can be made
on the Yamaha control surface. Consult the documentation
3
Application Note
that came with your Yamaha product for information on
selecting mic preamps to control and changing specific
parameters.
Configuring the Clocks
All devices in a digital audio network need to be run from
the same clock in order to avoid clock synchronization errors
which can produce audible ticks, pops, and dropouts. The
system outlined here is comprised of three groups of digital
products (AD8HR mic preamps, the Pro64 network, and one
or more digital consoles), all of which must follow a common
clock. Each device needs to be told what to use as its source
for that common clock.
Selecting a Clock Source
The Pro64 network can generate and distribute its own highly
accurate and stable clock, take in an externally distributed
clock at each node (i.e., “house clock”), or take in and distribute
an external clock. In this case, the external clock could come
from one of the AD8HRs, the digital console, or a dedicated
clock generator or other external device. The AD8HR preamps
can generate their own clock and output it, or run off an external clock received as a signal embedded in an AES3 data
stream or through its dedicated Word Clock In jack. Similarly,
the console can generate and output its own clock or run off
an external clock received a variety of ways.
A few rules to keep in mind:
• If you elect to use the internally generated
Pro64 network clock, that clock must be
passed to both the console and the AD8HRs.
• If you elect to use the console as the source
of the clock, one of the 6416Y2 cards must be
set as the network Control Master, which will
automatically set it as the Clock Master for
the network, slaved to the digital console’s
clock. That clock must then be passed on to
the 6416dio modules through the network
and then on to the AD8HRs.
• If you use one of the AD8HRs as the source of
the clock, a 6416dio must be set as the Pro64
Clock Master, slaved to the AD8HR clock,
and the 6416Y2 cards and the digital console
itself must all be set as slaves.
• If you use an externally generated clock,
every device must slave to that clock. One
Pro64 device must still be set as the network
Clock Master, but that device will run off the
external clock.
Remote Control of Yamaha Mic Preamps with the 6416Y2 and VDCs
P note: A 6416Y2 cannot be the Clock Master without being
the Control Master, so there is no separate Clock Master
switch on the card. If it is set as the Control Master, it
automatically becomes the Clock Master and begins
to slave to the console’s clock. By contrast, the 6416dio
can be the Clock Master without being the Control
Master.
Failing to set the clock parameters correctly for all devices
in the network will result in clicks and pops or audio
dropouts.
Using the Pro64 Network as the Clock Source
When the Pro64 network is the clock source, both the Yamaha
console and the AD8HRs need to be set up to sync to an external clock.
The first step is to set one of the 6416dio modules to be the
Control Master and Clock Master for the Pro64 network. Then,
there are two choices for syncing the AD8HRs to the network:
AES3 or Word Clock. (Using AES3 is easier, as it requires no
extra cables.)
To use AES3 to sync the AD8HR preamps:
• Connect the AD8HR AES output’s DB25
multipin cable to one of the 6416dio
modules.
• On the AD8HR front panel, press the Word
Clock button until the amber LED next to
Digital Out A is lit and flashing.
• Press the Word Clock button a second time
to confirm the change. The AD8HR is now set
to sync to the network via the AES clock.
96kHz
88.2kHz
48kHz
44.1kHz
WORD CLOCK
The AD8HR set to sync to AES clock
Repeat this clock setup for each AD8HR.
4
Application Note
To use Word Clock to sync the AD8HR preamps:
• Connect the AD8HR AES output’s DB25
multipin cable to one of the 6416dio
modules.
Clock setup screens vary from console to console, so consult
your console’s manual for detailed guidance on navigating
the interface.
• Connect the Word Clock Out jack on a
6416dio module to Word Clock In on the
AD8HR preamp using a BNC-BNC cable.
• On the AD8HR front panel, press the Word
Clock button until the amber LED next to
Word Clock is lit and flashing.
• Press the Word Clock button a second time
to confirm the change. The AD8HR will then
lock to the incoming Word Clock signal from
the Pro64 network, and then display the
network sample rate (for example, 48kHz).
• To add more AD8HR preamps to this system,
the Word Clock jacks on the back of the
AD8HR preamps need to be daisy chained
together, as can be seen on page 11 of the
Yamaha AD8HR manual. Alternatively, you
may pass Word Clock directly from other
6416dio modules to the other AD8HR
preamps. Either way, each additional AD8HR
needs to be set to receive Word Clock, as
described above.
96kHz
88.2kHz
48kHz
44.1kHz
DM1000 set to sync to a Pro64 clock
Using the Console as the Clock Source
If the Yamaha console is set to run off its internal clock, one
6416Y2 card in that console must be set as the Pro64 network
Control Master, which will automatically make it the Clock
Master as well, slaved to the console. All other 6416Y2 cards
must be set as slaves.
RS–232/422
B
A
WORD CLOCK
AD8HR set to sync to Word Clock
ON
STEREO LINK
6416Y2
To set up the console to slave to the Pro64
network:
• On the Yamaha console, go to the digital
I/O or clock page (this is different on each
console).
• You should see each 6416Y2 card that is
connected to an MY expansion slot in the
console.
• Use the cursor to select channels 1-2 on the
first 6416Y2 card.
• Press the Enter button on the Yamaha
console to confirm the clock change.
Remote Control of Yamaha Mic Preamps with the 6416Y2 and VDCs
AUTO CLK
CTL
ERR
Moving switch #12 to the down position sets the 6416Y2
as the Control Master, which will slave the Pro64 network
to the console’s clock.
The console can distribute clock from its Word Clock Out to
all other digital devices in the system or, more conveniently,
the Pro64 network can be used to distribute the clock. Be sure
to set the Clock Source for each 6416dio in the system to Network, and then AD8HR preamps can be synchronized via AES3
or Word Clock as described above.
Clock setup screens vary from console to console, so consult
your console’s manual for more information.
5
Application Note
either via daisy-chained Word Clock or through the Pro64 network as outlined in the sections above.
The 6416dio to which the master AD8HR is connected should
be set as the Pro64 Clock Master (and, in most cases, the Control Master as well), and the clock source on that device must
be set to either AES3 or Word Clock In. As before, using the
clock signal embedded in the AES3 data stream is simpler,
as no additional cables are required. The Clock Source on all
other 6416dio modules in the network should be set to “Network” (or “Word Clock” if the Word Clock from the AD8HR is
being distributed externally by a dedicated cable).
The clock setup screen on an M7CL set to run off its
internal clock at 48kHz
Using an AD8HR as the Clock Source
The AD8HR can generate its own clock internally, which can
be passed to the Pro64 network via its Word Clock Out or as a
clock embedded in the AES3 digital audio stream. To set the
AD8HR to use its internal clock:
• On the AD8HR front panel, press the Word
Clock button until the amber LED next to
desired sample rate is lit and flashing.
• Press the Word Clock button a second time
to confirm the change. The AD8HR is now
set to use its internal clock, which will be
automatically output through the Word
Clock Out jack and embedded in the AES3
data stream.
6416dio set as Clock Master, slaved to an external AES3
signal (TOP), and a 6416dio clock slave, set to receive its
clock from the network (BOTTOM)
Finally, be sure to set the console to slave to the first 6416Y2
card, as described in the section above on using the Pro64
network as the clock source.
96kHz
88.2kHz
48kHz
44.1kHz
WORD CLOCK
AD8HR set to use its internal clock at 48kHz
Note that only one AD8HR in a system can be set to use its
internal clock. All other AD8HRs must be syncing to that clock,
Remote Control of Yamaha Mic Preamps with the 6416Y2 and VDCs
6
Application Note
Beyond the Snake
One of the advantages of a digital audio backbone is the
ability to tie additional locations into the system easily. Remember that each digital device added to this system must
be set to use the same clock source as every other device.
Otherwise, ticks, pops, and audio dropouts will occur as the
different clocks fall in and out of sync with one another. If, for
instance, you add a second console to the system, be sure
that it is set to slave to Pro64 network or a externally distributed Word Clock.
An all-digital network featuring AD8HR preamps and Pro64
digital distribution, coupled with Pro16 monitor mixing
Aviom, A‑Net, the A‑Net icon, Pro16, Pro64, and Virtual Data Cable are trademarks of Aviom, Inc. All other trademarks are the property of their respective owners.
©2009 Aviom, Inc. All rights reserved. Information subject to change without notice. P/N 9300 1106 0001 rev. 1.5 102809
Download PDF