SIX-PACK” OPERATORS’ MANUAL
5
CONTROL DESCRIPTION
All six channels of the “Six-Pack” are identical and may be used completely
independently or linked for 5.1 surround operation.
EXPANDER
Threshold:
Range -70dB to +20dB.
This control sets the level below which expansion starts
to take place. When the expander starts to operate, the
red status LED will come on. Note: because the expansion
ratio varies with signal level, it is possible to arrive at a
situation where the red expansion LED may be illuminated
when little or no perceived gain reduction is taking place.
This means that the expansion Threshold may need to be
set a little higher than it would with a conventional
expander and final setting is best done by ear. The adaptive expansion system used
in the “Six-Pack” means, however, that setting up is not over-critical and the gating
action is far more progressive.
Release:
A release time of between 0.05 to 1 Second may be selected depending
on the material being processed. Percussive material with little or no
reverb is generally treated using a faster release setting, whereas
material with slow decays or a significant amount of added
reverberation will usually respond better to a longer release setting.
COMPRESSOR
Threshold:
Determines the input level above which
gain reduction will be applied and may be
set in the range -40 to +20dB. Soft knee
compression takes place for signals
exceeding the threshold level by up to 10dB
above which level, conventional 'ratio'
compression is applied.
Ratio:
Sets the final compression ratio that will be
applied once the 10dB 'soft-knee' region is
exceeded. The ratio may be continuously
adjusted from 1.2:1 to infinity:1 allowing
the possibility of true hard limiting.
Release:
Sets the rate at which the system gain returns to normal after the input
signal level has fallen below the threshold. This may be set in the range
0.05 seconds to 5 seconds.
Attack:
Sets the rate at which the compressor will respond to input signals that
exceed the threshold level. This may be set in the range 0.5mS to
100mS.
