KDFX Reference
KDFX Algorithm Specifications
10-139
In/Out When set to In the overall algorithm is active; when set to Out the algorithm is bypassed.
ReverbW/D This is a simple mix of the reverb input (dry) with the reverb output (wet) to produce the
final reverb output.
ReverbGain An overall level control of the reverb’s output (applied after the reverb Wet/Dry mix).
Rv HFDamp Reduces high frequency components of the reverb above the displayed cutoff frequency.
Removing higher reverb frequencies can often make rooms sound more natural.
Rv PreDlyL/R The delay between the start of a sound and the output of the first reverb reflections from
that sound. Longer predelays can help make larger spaces sound more realistic. Longer
times can also help improve the clarity of a mix by separating the reverb signal from the
dry signal, so the dry signal is not obscured. Likewise, the wet signal will be more audible
if delayed, and thus you can get by with a dryer mix while maintaining the same
subjective wet/dry level.
CompIn/Out When set to In the compressor is active; when set to Out the compressor is bypassed.
Rv Type Changes the configuration of the reverb algorithm to simulate a wide array of carefully
designed room types and sizes. This parameter effectively allows you to have several
different reverb algorithms only a parameter change away. Smaller Rv Types will sound
best with shorter Rv Times, and vice versa. (Note that since this parameter changes the
structure of the reverb algorithm, you may not modulate it.)
Comp Atk The time for the compressor to start to cut in when there is an increase in signal level
(attack) above the threshold.
Comp Rel The time for the compressor to stop compressing when there is a reduction in signal level
(release) from a signal level above the threshold.
CompSmooth 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.
CompSigDly The time in ms by which the input signal should be delayed with respect to compressor
side chain processing (i.e. side chain predelay). This allows the compression to appear to
take effect just before the signal actually rises.
Comp Ratio The compression ratio. High ratios are highly compressed; low ratios are moderately
compressed.
Comp Thres The threshold level in dBFS (decibels relative to full scale) above which the signal begins
to be compressed.
CompMakeUp Provides an additional control of the output gain. The Out Gain and MakeUpGain
controls are additive (in decibels) and together may provide a maximum of 24 dB boost to
offset gain reduction due to compression.
FdbkComprs A switch to set whether the compressor side chain is configured for feed-forward (Out) or
feedback (In).
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