Aural Exciter Controls (Model 303 Only) - Aphex COMPELLOR 300 Operating Manual

I
SILENCE GATE
THRESHOLD
I
IN/OUT
riel
A
CAUTION...
0
I
STEREO ENHANCE
IN
,
DRIVE
4.1.5 (Silence Gate) THRESHOLD Control
The Silence Gate is NOT a "noise gate" that mutes the audio. Instead, it
senses that the audio has dropped below your pre-determined level and
directs the COMPELLOR to " freeze," preventing any release of gain reduc-
tion. This action eliminates noise build-up common to other compressors or
ACC devices which occurs during pauses in program. The Silence Gate also
permits fade-outs, so the AGC is not fighting you as you try to lower the
output level.
The (Silence Gate) THRESHOLD Control lets you set the Silence Gate
Threshold from 0 to -40 dB, relative to your operating level (0 VU). Since it
inhibits any action by the COMPELLOR, it should never come on during
normal program material. The proper threshold level will be somewhere
between normal program and your noise floor. It should activate ( after
about 1 second delay) when audio stops or gets part way into a fade. Silence
Gate action will be indicated by the yellow LED above the THRESHOLD
knob.
4.1.6 IN/OUT Switch
The IN/OUT Switch provides a hardwire bypass for system in/out compari-
son. An accompanying LED indicates green for OUT and red for IN.
Since this switch is a hardwire bypass, any action being performed by the
COMPELLLOR will be eliminated, including gain reduction, balanced to un-
balanced and/or level translation. If you are converting a - 10 dB single-
ended source to a +4 dB balanced input and you select OUT, don't be
surprised to hear gross distortion and hum!
4.1.7 STEREO ENHANCE Switch (Model 300 only)
When you select STEREO ENHANCE (green LED), an internal circuit meas-
ures the amount of stereo information ( L-R) present at the inputs and gener-
ates an additional control signal that is sent equally to both VCA's. As the
amount of stereo information increases, the output level from each VCA also
increases slightly and, importantly, equally. The result is an increased stereo
impression without any effect on monaural information.
4.2 AURAL EXCITER Controls
The following controls apply only to COMPELLOR Model 303.
4.2.1 DRIVE Control
The DRIVE Control sets the proper input level to the AURAL EXCITER
enhancement-generating circuitry. A tri- color LED, located directly above
the control, provides a visual indication of the amount DRIVE level. With a
proper setting, the LED should indicate mostly green/yellow with program
4-4 Front Panel Controls