Expansion Transfer Characteristic - Kurzweil K2661 Musician’s Reference Manual

KDFX Reference
KDFX Algorithm Specifications
noise), and the threshold set just above the noise level. You can set just how far to drop the noise with the
expansion ratio.
Figure 10-107 Expansion Transfer Characteristic
The signal being expanded may be delayed relative to the side chain processing. The delay allows the
signal to stop being expanded just before an attack transient arrives. Since the side chain processing
"knows" what the input signal is going to be before the main signal path does, it can tame down an attack
transient by releasing the expander before the attack actually happens.
A meter is provided to display the amount of gain reduction that is applied to the signal as a result of
expansion.
Parameters
Page 1
In/Out
Page 2
Atk Time
Rel Time
SmoothTime
Signal Dly
In/Out
Out Gain
Atk Time
Rel Time
SmoothTime
10-204
Out
Amp
In or Out
0.0 to 228.0 ms
0 to 3000 ms
0.0 to 228.0 ms
0.0 to 25.0 ms
When set to "In" the expander is active; when set to "Out" the expander is bypassed.
The output gain parameter may be used to increase the gain by as much as 24 dB, or
reduce the gain to nothing. Note that the Out Gain parameter does not control the signal
level when the algorithm is set to "Out".
The time for the expander to increase the gain of the signal (turns off the expander) after
the signal rises above threshold.
The time for the expander to reduce the signal level when the signal drops below the
threshold (turning on expansion).
A lowpass filter in the control signal path. It is intended to smooth the output of the
expander's envelope detector. Smoothing will affect the attack or release times when the
smoothing time is longer than one of the other times.
Threshold
In Amp
Out Gain
Ratio
Threshold
MakeUpGain
Off, -79.0 to 24.0 dB
1:1.0 to 1:17.0
-79.0 to 0.0 dB
Off, -79.0 to 24.0 dB