4x4 Audio Controller - Custom Audio Electronics

custom audio electronics inc.
•
•
•
4x4
AUDIO CONTROLLER
OPERATING
GUIDE
10648 Magnolia Blvd. North Hollywood, CA. 91601 Phone (818) 763-8898 Fax (818) 763-8890
Designed and developed by Bob Bradshaw, well known for his world class Guitar Switching Systems. The 4x4
is the first in a series of high-quality audio switching modules for Custom Audio Electronics that can be used
whenever ultra low noise, sonically transparent signal routing is required. Consisting of four discrete audio
loops and four relay contact closures, the 4x4 is activated by MIDI controller data and may be configured for a
wide variety of uses.
Features:
• Sonically transparent, passive audio switching elements.
• Ultra low noise, wide bandwidth and dynamic range.
• Silent, click-free switching...even in high gain applications.
• Separate in, out, send and return jacks for each of the four audio loops.
• Different audio switching elements can be installed for critical applications (consult factory).
• Super low noise buffer circuit for high to low impedance matching (bypassable).
• Four relay contact closures (C1-C4) for devices utilizing switch to ground functions.
• Stereo jacks for C1-C4 allow normally open or normally closed relay operation.
• MIDI controlled - simple to operate. Can be activated by a wide variety of MIDI controllers including the CAE
RS-10 and RS-10 MKII.
• Powered by a 9 volt AC or DC remote power supply for lowest noise.
• Front panel LED display indicates status of each loop and control function.
Uses/Benefits:
• Loops 1 through 4 can be used at instrument level before amps for switching pedal effects, or at line level
for high quality signal processing between preamps and power amps.
• Transparent; when used in line between instruments and amps, the 4x4 loops cause no audible signal
degradation or added noise.
• Loops can be configured as in-line bypass, audio muting and A/B select circuits with silent switching.
• Relay control C1-C4 functions are completely isolated, preventing ground loops and can be used to
channel switch amps or wherever a latching footswitch function is used.
• High quality, low noise buffer circuit prevents unnecessary loading of high impedance instruments, thus
allowing multiple amp combinations and long series chains of effects with unsurpassed clarity. Buffer can be
bypassed for a completely passive switching system or factory adjusted for optimum use.
• Modular. More than one 4x4 may be used in a system with individual access to each loop or control function
via MIDI controller data. Systems using more than one 4x4 can expand as your needs grow.
• Can be used to expand and improve performance of existing systems such as the Rocktron/Bradshaw
RSB18R (consult factory for details).
Grounding the CAE 4x4 Audio Controller
This CAE 4x4 Audio Controller is equipped with an internal ground lift switch. This switch removes audio common
from chassis to eliminate ground loops. It comes from the factory in the grounded position. If you have trouble
with ground loops (with the 4x4 bolted to a rack along with other equipment), follow this procedure:
1. Remove the 10 screws from the top cover.
2. Locate the ground lift switch at the lower left of the main circuit board with the unit facing you.
3. Set the switch to the right to lift ground.
4. Reinstall the top cover.
Block Diagram 4x4 Loops
LOOP 1
LOOP 2
LOOP 3
LOOP 4
Send Return
Send Return
Send Return
Send Return
Out
In
Front
Panel
In
In
Out
In
Out
MIDI
Control
MIDI
Control
In
Out
MIDI
Control
MIDI
Control
4 Ways To Use 4x4 Loops
EFFECT
EFFECT
In
Out
In
Out
MIDI
Control
In
Out
(Not Used)
MIDI
Control
Typical Loop In Effect Bypass Configuration
(Shown effect “In”)
Loop Used As Input Mute For Use With Mixers, Etc.
(Shown Effect “Out”)
OUT B
IN B
(Not Used)
Send Return
In
In
(Not Used)
Send Return
Send Return
In
MIXER
Out
(Not Used)
Send Return
In
Out
OUT A
MIDI
Control
Loop As A/B Output Select
(Shown output “A” on)
Out
IN A
MIDI
Control
Loop As A/B Source Select
(Shown “In B” Active)
SCHEMATIC DIAGRAM OF EACH
4X4 AUDIO/CONTROL FUNCTION
TIP
Normally Open Contact
T.R.S. (Stereo)
1/4” Phone Jack
RING
Common Contact
SLEEVE
Normally Closed Contact
MIDI Logic Control
1 of 4 Circuits
USE THIS TYPE OF CABLE TO USE
THE 4X4 FUNCTIONS AS AUDIO MUTES
TIP TO TIP
INPUT
SLEEVE (COMMON)
4x4
C1 - C4
MONO PLUGS
T.R.S. PLUG
OUTPUT
RING TO TIP
USE A STANDARD MONO CABLE FOR
NORMALLY OPEN CONTROL FUNCTIONS
TIP TO TIP
4x4
C1 - C4
SLEEVE (COMMON)
USE THIS TYPE OF CABLE FOR
NORMALLY CLOSED CONTROL FUNCTIONS
RING TO TIP
4x4
C1 - C4
SLEEVE (COMMON)
T.R.S. PLUG
MONO PLUG
Description of CAE 4x4 & RS-10 MIDI Control Assignments
The CAE 4x4 Audio Controller’s loops and control functions respond to MIDI control change commands in omni
mode. These numbers are fixed at the factory and cannot be changed except by software revision. Currently
there are several different configurations available (see chart). In a system consisting of several 4x4’s, care must
be taken so that loops and/or control functions do not share the same MIDI control number, unless multiple loops
and/or control functions need to be activated at the same time (by one MIDI control number). For example: a 4x4
stereo loop consists of 2 mono loops assigned, via software, the same MIDI control number. The CAE RS-10 MIDI
Foot Controller has the ability to assign any MIDI control number (0-127) to each of its 10 direct access controller
switches (SW0-SW9), as well as its continuous control ports (P1 and P2). This way you can arrange and group
your system controls according to their functions. For example, preamp or amp select switches can be arranged in
a row or group with other effects or functions in other rows or groups. Please consult the RS-10 operating manual
on how to program (assign) MIDI controller numbers to the 10 direct access controller switches (as well as
continuous control ports P1 and P2). The following is a chart showing 4x4 loop/control functions, software revision,
RS-10 MIDI control number assignments as well as each loop/control function’s role in your specific system.
Please retain for future reference.
MIDI Control #
4x4
Software
Revision:
W1
ON
OFF
4x4
Software
Revision:
W1
ON
OFF
4x4
Software
Revision:
W1
ON
OFF
Software
Revision:
Note: 4x4’s receive control
commands in omni mode.
L1
L2
L3
L4
C1
C2
C3
C4
L1
L2
L3
L4
C1
C2
C3
C4
L1
L2
L3
L4
C1
C2
C3
C4
MIDI
Channel
RS-10
Specific Function in System
MIDI
Control #
4x4 Loop/Control Function
Specific Function in System
SW0
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
P1
P2
Important: The above MIDI control numbers assigned to the 10 direct access controller switches may be different that the RS-10’s factory default settings.
If the RS-10’s memory has been cleared or reset, the above MIDI control numbers must be reassigned for each switch so that proper communication
between RS-10 and 4x4’s will occur.
Other Available 4x4 Software Versions
4x4 #1
W1 OFF
4x4 L1 = MIDI Control #13
4x4 L2 = MIDI Control #14
4x4 L3 = MIDI Control #15
4x4 L4 = MIDI Control #16
4x4 C1 = MIDI Control #9
4x4 C2 = MIDI Control #10
4x4 C3 = MIDI Control #11
4x4 C4 = MIDI Control #12
W2 ON
4x4 L1 = MIDI Control #17
4x4 L2 = MIDI Control #17
4x4 L3 = MIDI Control #18
4x4 L4 = MIDI Control #18
4x4 C1 = MIDI Control #9
4x4 C2 = MIDI Control #10
4x4 C3 = MIDI Control #11
4x4 C4 = MIDI Control #12
4x4 #2
4x4 L1 = MIDI Control #9
4x4 L2 = MIDI Control #10
4x4 L3 = MIDI Control #11
4x4 L4 = MIDI Control #12
4x4 C1 = MIDI Control #9
4x4 C2 = MIDI Control #10
4x4 C3 = MIDI Control #11
4x4 C4 = MIDI Control #12
4x4 L1 = MIDI Control #17
4x4 L2 = MIDI Control #18
4x4 L3 = MIDI Control #19
4x4 L4 = MIDI Control #20
4x4 C1 = MIDI Control #9
4x4 C2 = MIDI Control #10
4x4 C3 = MIDI Control #11
4x4 C4 = MIDI Control #12
4x4 #3
4x4 L1 = MIDI Control #13
4x4 L2 = MIDI Control #14
4x4 L3 = MIDI Control #15
4x4 L4 = MIDI Control #16
4x4 C1 = MIDI Control #17
4x4 C2 = MIDI Control #18
4x4 C3 = MIDI Control #19
4x4 C4 = MIDI Control #20
4x4 L1 = MIDI Control #17
4x4 L2 = MIDI Control #17
4x4 L3 = MIDI Control #18
4x4 L4 = MIDI Control #18
4x4 C1 = MIDI Control #13
4x4 C2 = MIDI Control #14
4x4 C3 = MIDI Control #15
4x4 C4 = MIDI Control #16
4x4 #4
4x4 L1 = MIDI Control #19
4x4 L2 = MIDI Control #20
4x4 L3 = MIDI Control #21
4x4 L4 = MIDI Control #21
4x4 C1 = MIDI Control #22
4x4 C2 = MIDI Control #23
4x4 C3 = MIDI Control #24
4x4 C4 = MIDI Control #25
4x4 L1 = MIDI Control #19
4x4 L2 = MIDI Control #19
4x4 L3 = MIDI Control #20
4x4 L4 = MIDI Control #20
4x4 C1 = MIDI Control #21
4x4 C2 = MIDI Control #22
4x4 C3 = MIDI Control #23
4x4 C4 = MIDI Control #24
4x4 #5
4x4 L1 = MIDI Control #41
4x4 L2 = MIDI Control #42
4x4 L3 = MIDI Control #43
4x4 L4 = MIDI Control #44
4x4 C1 = MIDI Control #45
4x4 C2 = MIDI Control #46
4x4 C3 = MIDI Control #47
4x4 C4 = MIDI Control #48
4x4 L1 = MIDI Control #51
4x4 L2 = MIDI Control #52
4x4 L3 = MIDI Control #53
4x4 L4 = MIDI Control #54
4x4 C1 = MIDI Control #55
4x4 C2 = MIDI Control #56
4x4 C3 = MIDI Control #57
4x4 C4 = MIDI Control #58
NOTE: W1 is a port on the microprocessor circuit board that must be shorted (on) or left open (off), depending on
which configuration is used for a given 4x4 software revision.
Controlling the CAE 4x4 Audio Controller with the
CAE RS-10 MIDI Foot Controller
Connect the MIDI out of the RS-10 to the MIDI in of the 4x4 with a 7 pin DIN (MIDI) cable. You can connect other MIDI
devices via the MIDI out/thru jack of the 4x4. Connect the 9VAC Power Supply to the 4x4 AC power jack. The 4x4
will supply power to the RS-10. There is no need for two power supplies when using a 4x4 with an RS-10.
The 4x4 Audio Controller responds to MIDI Controller data in Omni mode.
MIDI value 0 = Loop out/Control function relay unenergized/LED off
MIDI Value 127 = Loop in/Control function relay energized/LED on
The 4x4 Loops/Control functions and their respective MIDI Controller numbers are as follows:
W1 OFF
L1 = MIDI Control #11
L2 = MIDI Control #12
L3 = MIDI Control #13
L4 = MIDI Control #14
W1 ON
L1 = MIDI Control #31
L2 = MIDI Control #32
L3 = MIDI Control #33
L4 = MIDI Control #34
C1 = MIDI Control #15
C1 = MIDI Control #16
C1 = MIDI Control #17
C1 = MIDI Control #18
C1 = MIDI Control #35
C1 = MIDI Control #36
C1 = MIDI Control #37
C1 = MIDI Control #38
L1 + L2 = MIDI Control #19
L3 = L4 = MIDI Control #20
L1 + L2 = MIDI Control #39
L3 + L4 = MIDI Control #40
C1 Momentary (60ms.) = #21
C2 Momentary (60ms.) = #22
C3 Momentary (60ms.) = #23
C4 Momentary (60ms.) = #24
C1 Momentary (60ms.) = #41
C2 Momentary (60ms.) = #42
C3 Momentary (60ms.) = #43
C4 Momentary (60ms.) = #44
NOTE: W1 is a port on the micro controller circuit board that must be shorted (ON) or left open (OFF), depending
which configuration is used.
These controller numbers are fixed and cannot be changed except by software revision. Consult the factory if you
require different numbers.
When the RS-10 has its factory default settings, the direct access controller switches (SW0 - SW9) control the 4x4
loops/control functions as follows:
RS-10 SW0 = 4x4 Not Used
RS-10 SW1 = 4x4 Not Used
RS-10 SW2 = 4x4 L1
RS-10 SW3 = 4x4 L2
RS-10 SW4 = 4x4 L3
RS-10 SW5 = 4x4 L4
RS-10 SW6 = 4x4 C1
RS-10 SW7 = 4x4 C2
RS-10 SW8 = 4x4 C3
RS-10 SW9 = 4x4 C4
Controlling the CAE 4x4 Audio Controller with the Rocktron RSB 18
The 4x4 Audio Controller responds to MIDI controller data in Omni mode.
MIDI value 0 = Loop out/Control function relay unenergized
MIDI value 127 = Loop in/Control function relay energized
Connect MIDI out of the RSB 18R to the MIDI in of the CAE 4x4. Use the CAE 4x4 MIDI out/thru to connect MIDI to
other devices in the chain.
The 4x4 Loops/Controls and their respective MIDI controller numbers are as follows:
4x4 Loop 1
MIDI controller #11
4x4 C1
MIDI controller #15
4x4 Loop 2
MIDI controller #12
4x4 C2
MIDI controller #16
4x4 Loop 3
MIDI controller #13
4x4 C3
MIDI controller #17
4x4 Loop 4
MIDI controller #14
4x4 C4
MIDI controller #18
To Program the RSB 18F to send controller numbers, follow this procedure:
In Bank/Preset mode:
1. Press 2nd, then the MIDI switch five times.
2. Use the set/select switches (< >) to scroll through the loops and control functions.
3. Assign the loop the proper controller number using the bank up/down switches.
Example:
RSB L1 = C11
RSB L2 = C12
RSB L3 = C13
RSB L4 = C14
RSB C1 = C15
RSB C2 = C16
RSB C3 = C17
RSB C4 = C18
4. After assigning the Loops/Controls their MIDI controller numbers, press store.
5. Press 2nd switch to exit 2nd mode.
You have now assigned the RSB 18F to control the CAE 4x4. The RSB 18F Loop 1-4 switches control both the
RSB 18R loops (1-4) and the 4x4 loop (1-4) at the same time. The same is true with the C1 - C4 control functions.
The RSB 18F activates both C1 - C4 in the RSB 18R and the CAE 4x4. You can now plug your instrument into the
4x4’s front panel input and send the signal via the 4x4’s send jacks to four preamp inputs. Bring each preamp’s
output to the RSB 18R return jacks. This physically separates the preamp’s inputs from their outputs (inputs
connect from the 4x4, outputs to the RSBR) and allows high gain switching without oscillations, squealing, and
unnecessary noise.
Use 4x4 with pedals before amplifier.
Use C1-C4 to channel switch amp if necessary.
Made in the
USA
9VAC
1500 MA
MIDI
IN
OUT/THRU
Control Functions
C1
C2
C3
Loop 4
C4
OUT
Loop 3
RETURN SEND
IN
OUT
Loop 2
RETURN SEND
IN
OUT
Loop 1
RETURN SEND
IN
OUT
RETURN SEND
in
in
in
in
FX4
FX3
FX2
FX1
R
L
R
outs
L
R
outs
L
R
outs
IN
L
outs
9
8
7
6
5
4
3
2
R
L
R
L
R
L
R
L
in
in
in
LINE MIXER
outs
R
in
CH1
pan
center
L
in
STEREO POWER AMP
GUITAR
PREAMP OUTPUT
BRIGHT
4
3
2
BRIGHT
4
3
2
BRIGHT
4
3
2
5
6
1
10
5
6
7
8
9
5
6
1
10
5
6
4
3
2
7
8
9
5
6
1
10
5
6
4
3
2
7
8
9
5
6
1
10
5
6
4
3
2
7
8
9
5
6
1
10
5
6
4
3
2
7
8
9
CH1
5
6
1
10
5
6
4
3
2
7
8
9
EQ
INPUT
Preamp’s Channel Switching
1
10
5
6
1
10
7
8
9
4
3
2
7
8
9
4
3
2
1
10
5
6
1
7
8
9
4
3
2
7
8
9
4
3
2
10
1
10
5
6
1
10
7
8
9
4
3
2
7
8
9
4
3
2
1
10
5
6
1
10
7
8
9
4
3
2
7
8
9
4
3
2
7
8
9
1
10
5
6
7
8
9
1
10
EQ
CH3
CH2
4x4 with stereo line mixer and stereo effects
CH2
4
3
2
CH3
4
3
2
7
8
9
1
10
5
6
7
8
9
1
10
custom
audio
electronics
3+SE Tube Preamp
Guitar
Input
custom audio electronics
4x4 Audio Controller
L1
Made in the
USA
MIDI
9VAC
1500 MA
IN
Control Functions
C1
OUT/THRU
C2
C3
L2
L3
L4
C1
C2
Loop 4
C4
OUT
C3
C4
Loop 3
RETURN SEND
IN
OUT
Loop 2
RETURN SEND
IN
OUT
Loop 1
RETURN SEND
IN
OUT
RETURN SEND
IN
IN
Control functions
of Preamp
BRIGHT
5
6
5
6
5
6
5
6
5
6
5
6
1
10
1
10
1
10
1
10
1
10
1
10
5
6
5
6
5
6
5
6
5
6
5
6
1
10
1
10
1
10
1
10
1
10
1
10
5
6
5
6
5
6
5
6
5
6
5
6
1
10
1
10
1
10
1
10
1
10
1
10
4
3
2
7
8
9
4
3
2
7
8
9
4
3
2
7
8
9
4
3
2
7
8
9
4
3
2
7
8
9
CH1
4
3
2
7
8
9
EQ
INPUT
BRIGHT
BRIGHT
4
3
2
7
8
9
4
3
2
7
8
9
4
3
2
7
8
9
4
3
2
4
3
2
7
8
9
7
8
9
4
3
2
4
3
2
7
8
9
7
8
9
4
3
2
4
3
2
7
8
9
7
8
9
4
3
2
CH2
7
8
9
CH3
4
3
2
custom
audio
electronics
7
8
9
4
3
2
7
8
9
3+SE Tube Preamp
Preamp
Output
5
BRIGHT
4
3
2
BRIGHT
4
3
2
BRIGHT
4
3
2
6
1
10
5
6
5
7
8
9
4
3
2
7
8
9
4
3
2
7
8
9
4
3
2
6
1
10
5
6
5
7
8
9
4
3
2
7
8
9
4
3
2
7
8
9
4
3
2
6
1
10
5
6
5
7
8
9
4
3
2
7
8
9
4
3
2
7
8
9
4
3
2
6
1
10
5
6
5
7
8
9
4
3
2
7
8
9
4
3
2
7
8
9
4
3
2
6
5
7
8
9
1
10
5
6
CH1
4
3
2
CH2
4
3
2
CH3
4
3
2
Control functions
of Preamp
6
7
8
9
1
10
5
6
EQ
INPUT
IN
1
10
5
6
1
10
1
10
5
6
1
10
1
10
5
6
1
10
1
10
5
6
1
10
7
8
9
1
10
5
6
7
8
9
1
10
7
8
9
1
10
5
6
7
8
9
1
custom
audio
electronics
3+SE Tube Preamp
10
Preamp Output
Caution: Do not remove
cover. Shock hazard.
No user serviceable
parts inside.
FUSE
Replace only with
1 / 2 amp fuse.
OUT
10
RETURN SEND
IN
OUT
9
RETURN SEND
IN
OUT
8
RETURN SEND
IN
OUT
7
RETURN SEND
IN
OUT
6
RETURN SEND
IN
OUT
5
RETURN SEND
IN
OUT
4
RETURN SEND
IN
OUT
3
RETURN SEND
IN
OUT
2
RETURN SEND
IN
OUT
1
RETURN SEND
IN
OUT
IN
Made in U.S.A.
Rocktron Corp.
Rochester, MI.
MIDI OUT
100/110VAC
220/240VAC
50/60Hz
50/60Hz
35W
35W
MIDI IN
RIGHT
C4
C3/C4
C4
C1/C2
LEFT
HUSH IN
OUT
11
RETURN SEND
RIGHT
IN
OUT
11
RETURN SEND
IN
PROG.VCA
OUT
IN
PREAMP OUT
PROG. HUSH
LEFT
Interfacing to the Rocktron RSB Systems for using multiple preamps.
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