7
choirflex owner’s guide
Starting up
After connection to an appropriate power source, the
POWER
button may be momentarily depressed to start
the processor. Upon power-up, the LED ring surrounding
the button will glow and the center LCD display will illu-
minate. At any point, momentarily depress the
POWER
button to turn Choirflex off.
Do not
shut down Choirflex
by removing power to the unit before safely turning off
the unit with the power button. Only remove power after
the system has been safely shut down using the
POWER
button and the LED ring around the button is no longer
illuminated.
Input levels and metering
Choirflex works by analyzing the stereo choir signal and
the main loudspeaker mix, and then processing the choir
audio accordingly to enhance gain and tonality. This adap-
tive learning is threshold dependent; therefore, it is essen-
tial that gain structure is optimized.
The LCD screen contains four channels of input metering,
with two channels labeled
CHOIR
and two channels la-
beled
REFERENCE
. The system operates most optimally
when driving input signals in the “amber” range. Audible
clipping will result with input signals exceeding the max-
imum input level capability of the processor. The LCD
screen also shows four channels of output metering, with
two channels labeled
CHOIR
and two channels labeled
SPLIT
. These stereo output pairs are identical and can be
used simultaneously and interchangeably.
1
2
3
4
1
POWER button. Press once to turn the system on, press
again to turn the system off. The LED ring around the
button will illuminate when the system is powered on.
2
INPUT metering for Choir and Reference input signals.
3
Output metering for Choir and Split output signals.
4
Ideal range for input and output signals during a perfor-
mance. Avoid clipping (top of red meter range) as audible
artifacts will result.
