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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.

Summary of Contents for Choirflex-A

Page 1: ...choir owner s guide venueflex com...

Page 2: ...this apparatus near water Clean only with a dry cloth Do not block any ventilation openings Install in accordance with the manufacturer s instructions Do not install near any heat sources such as radi...

Page 3: ...l ization can help but are quite often not enough and these solutions often deteriorate musicality and tone Choirflex is a proprietary adaptive digital audio processor designed to increase the clarity...

Page 4: ...case do not cover or obstruct the ventilation ports on the sides of the Choirflex unit Power connection Connect the supplied power supply to the port labeled DC POWER Do not use any power source other...

Page 5: ...mix through a dedicated matrix bus or similar to allow the signal level feeding Choirflex to be appropriately trimmed Analog audio connections for Choirflex A Four input connections are provided on 3...

Page 6: ...CHOIR and SPLIT These may be connected to other devices in your system mixing consoles signal processors preamplifiers etc Note that standard Dante unicast and multicast rules may be employed as long...

Page 7: ...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 sy...

Page 8: ...reating the final mix Once all four inputs of Choirflex are receiving proper sig nal levels begin mixing the output of Choirflex to the PA system Ensure that the stereo Choirflex output is hard panned...

Page 9: ...connectors 50 impedance 4 channels of Dante network audio 48kHz only Frequency response 20Hz to 20kHz 0 2dB 20Hz to 20kHz Network 1000 100 Mbps ethernet service only on Neutrik etherCON 1000 100 Mbps...

Page 10: ...8620 Westmoreland Drive NW Concord NC 28027 1 877 923 4567 venueflex com info venueflex com...

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