Keyed Expander - ENSONIQ DP/4 Musician's Manual

Section 4 - Algorithms
KEYED EXPANDER
00 - Keyed Expander operation is identical to the Expander. The only difference is that the left
signal (Input 1) is expanded as determined by the key. The key is the right channel signal (Input 2).
Keyed Expander Signal Routing
118
Left
Right
01- Mix
02-Volume
Expander
Filtering
(side chain)
Side Trim
Keyed
Expander
Output
Mixer
Main
Output
See the descriptions under the Mix and Volume Parameters, in the beginning of this section. The
Mixer works as in all the other algorithms, and is distinct from the output mixer shown
in
the
diagram above.
03 - Exp Ratio
Range: 1:1 to 1 :40, infinity
Sets the amount of expansion. The range is based on decibels (dB) below the threshold. If this is
set to 1:4 for example, it will expand changes in signals below the threshold by a factor of four.
When this is set to infinity, it acts as a gate. A setting of 1:1 offers no expansion.
04 - Exp Threshold
Range: -96 to +00 dB
This parameter sets the threshold level. Signals that exceed this level will be unaffected, while
signals that are below will be expanded. To tum off the expander, set the level to -96 dB.
05 - Gain Change
Range:
NlA
This read only parameter displays the amout of gain reduction in real time.
06 - Exp Attack
Range:
50~s
to 100ms
This parameter determines the attack rate after the initial signal has been detected and before the
expansion takes affect.
07 - Exp Release
Range: 1ms to 10.0s
This parameter determines the release rate after the signal has been detected below the threshold
level. This is generally chosen longer than the attack time (parameter 06).
08 - Expander Gate Hold Time
Range: 1 ms to 10.0s
This parameter is the detection sustain time in the ADSR which constitutes attack, sustain, and
release.
ENSONIQ DP/4 Musician's Manual
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