Kurzweil K2600 Musician’s Reference page 236

KDFX Reference
KDFX Algorithm Specifications
expander may be used to suppress background noise in the absence of signal, thus typical expander
settings use a fast attack (to avoid losing real signal), slow release (to gradually fade out the 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 10-82
The signal being compressed/expanded may be delayed relative to the side chain processing. The delay
allows the signal to start being compressed (or stop being expanded) just before an attack transient arrives.
Since the side chain processing ÒknowsÓ what the input signal is going to be before the main signal path
does, it can tame down an attack transient by compressing the attack before it actually happens (or
releasing the expander before the attack happens). This feature works whether the side chain is conÞgured
for feed-forward or feedback.
A meter is provided to display the amount of gain reduction that is applied to the signal as a result of
compression and expansion.
The algorithm Comp/Exp + EQ differs from Compress/Expand in that the compressor and expander
sections are followed by equalization Þlters. The output signal may be Þltered with bass and treble
shelving Þlters and a mid-range parameteric Þlter.
Parameters
Page 1
In/Out
FdbkComprs
Page 2
Comp Atk
Comp Rel
SmoothTime
Signal Dly
Page 3
Comp1Ratio
Comp1Thres
Comp2Ratio
Comp2Thres
10-150
Out
Amp
Expansion Transfer Characteristic
In or Out
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
1.0:1 to 100.0:1, Inf:1
-79.0 to 0.0 dB
1.0:1 to 100.0:1, Inf:1
-79.0 to 0.0 dB
Threshold
In Amp
Out Gain
Exp Atk
Exp Rel
Exp Ratio
Exp Thres
MakeUpGain
Off, -79.0 to 24.0 dB
0.0 to 228.0 ms
0 to 3000 ms
1:1.0 to 1:17.0
-79.0 to 0.0 dB
Off, -79.0 to 24.0 dB