C
OMREX
C
ORPORATION
42
STAC Product Manual
43
Several options still exist for those who can’t create a mix-minus of any
kind on their console. For those with electronic experience, it is possible
to build a mix-minus “nulling” device using the post-fade signal of each
caller fader in your console. Essentially, you can build an analog subtrac-
tion circuit to remove these signals from the main console output.
It’s also sometimes reasonable not to build a mix-minus at all, but rather
to tap the main studio microphone signal before the console and feed it
directly into the STAC
Send Input
, as in Figure 5. Note that callers will
not be able to hear anything other than the host microphone while
On Air
(no commercials, music, or other audio sources) but this may be suitable
in some circumstances, since the caller will hear the entire program mix
while
On Hold
. Set
DIP Switch 1
on the STAC mainframe to
ON
to make
the
Send Input
compatible to a microphone level.
Figure 5 - Feeding Mic Audio Only
O
PTION
D - N
O
A
UX
B
US
OR
M
IX
-M
INUS
M
ODULE
A
VAILABLE
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To Air Program
Out
Microphone
Send In Hold Audio In Aux Out Hybrid 1 Hybrid 2
Out Out
Send Caller Telephone
In Out Line In
