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Push in the CR/PHONES switch to route the talkback
signal to the PHONES (42) output. Use this to commu-
nicate with the talent in the studio through the head-
phones during a recording session. When the talkback
circuit is activated (by pushing the TALKBACK (35)
switch), the CONTROL ROOM outputs are attenuated by
20 dB to allow the engineer's voice to come through loud
and clear.
This switch routes the talkback signal to the AUX 1
and 2 outputs (38). Use this to communicate with the
musicians on-stage through their monitors during a live
performance.
By the way, it is okay to have both destination switch-
es pushed in at the same time. The talkback signal will
be routed to both destinations. But if you don't have ei-
ther of the destination switches pushed in, the talkback
signal won't go anywhere. You might as well be talking to
a brick wall.
This is a momentary switch, meaning it's only active
when you hold the switch down. As long as you hold
this switch down, the talkback signal is routed to the
outputs determined by the destination switches (33/34).
Release the switch, and the talkback circuit is turned off.
These are a few more important features that
shouldn't be overlooked.
The MAIN MIX fader controls the output level just
before the MAIN OUTPUTS (1/4" and XLR) (40/46) and
the TAPE OUTPUTS (41). When MAIN MIX is selected
for the CONTROL ROOM/PHONES SOURCE (20), the
MAIN MIX fader also controls the main mix level in the
CONTROL ROOM and PHONES outputs (48/42).
When the fader is fully down, the MAIN MIX is off.
The "U" marking indicates unity gain, and fully up pro-
vides 10 dB of additional gain. Typically, this fader is set
near the "U" label and left alone, but it can be used for
song fade-outs or quick system-wide mutes.
This LED performs one function—it lets you know
when the Onyx 1220 is turned on and ready to go!
AUX MASTER
1
PRE
POST
+15
O O
2
PRE
POST
+15
O O
TALK
MIC
BACK
TALKBACK
MAX
O O
LEVEL
EXTERNAL
MIC
DESTINATION
CR/
AUX
PHONES
1-2
TALKBACK
AUX RETURN
1
+10
O O
2
FX TO
MON
+10
O O
POWER
MAIN
MIX
dB
10
5
U
5
10
20
30
40
50
60
O O
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