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KDFX Reference
KDFX Algorithm Specifications
the attack and release times, although the effect is significant only when its time is longer than the attack or
release time. Generally the smoothing time should be kept at or shorter than the attack time.
You have the choice of using the compressors configured as feed-forward or feedback compressors. For
feed-forward, set the FdbkComprs parameter to Out; for feedback compression, set it to In. The feed-
forward configuration uses the input signal as the side-chain source. The feedback compressor on the
other hand uses the compressor output as the side-chain source. Feedback compression tends to be more
subtle, but you cannot get an instant attack.
In the feedback configuration, the signal being compressed may be delayed relative to the side chain
compression processing. The delay allows the signal to start being compressed 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 compressing the attack before it actually
happens.
A meter is provided to display the amount of gain reduction that is applied to the signal as a result of
compression.
Parameters:
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In/Out When set to In the compressor is active; when set to Out the compressor is bypassed.
Out Gain 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.
Band FreqC The coarse control for the center frequency of the filter band to be compressed. Only
signal components centered in the band will be compressed.
Band FreqF The fine control for the center frequency of the filter band to be compressed. Only signal
components centered in the band will be compressed.
Band Width The width of the frequency band to be compressed in octaves. Small values compress a
very narrow range of frequencies. Large values compress a broad range of frequencies.
SC Input Select the input source channel for side-chain processing—left (L), right (R) or both
(L & R). When set to L & R, the maximum amplitude is used.
In/Out In or Out Out Gain Off, -79.0 to 24.0 dB
Band FreqC 8 to 25088 Hz FdbkCmprs In or Out
Band FreqF -100 to 100 ct SC Input L, R, L & R
Band Width 0.010 to 5.000 oct ComprsChan L, R, L & R
Atk Time 0.0 to 228.0 ms Ratio 1.0:1 to 100.0:1, Inf:1
Rel Time 0 to 3000 ms Threshold -79.0 to 0.0 dB
SmoothTime 0.0 to 228.0 ms MakeUpGain Off, -79.0 to 24.0 dB
Signal Dly 0.0 to 25.0 ms
|||||||||||||||||||||||||||||| Reduction
-dB 40 20 12 8 6 4 2 0
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