Using the Algorithms
Compressors, Expanders, and Gates
5-6
EQ Morpher
This Algorithm uses two four-band bandpass Þlters, A and B, and moves between them, which
among other things, can produce a very convincing simulation of a human vocal tract.
FreqScale
offsets the Þlter frequencies for each set of Þlters. After setting the Þlter parameters
(
Freq
,
Gain
, and
Width
), the FreqScale parameters will move each of the four Þlter frequencies
together by the same relative pitch. Range is -8600 to 8600 cents.
Morph A>B
. When set to 0% the ÒAÓ parameters are controlling the Þlters, and when set to
100%, the ÒBÓ parameters control the Þlters. Between 0 and 100%, the Þlters are at interpolated
positions. When morphing from A to B settings, the A Þlter #1 will change to the B Þlter #1, A
Þlter #2 moves to B Þlter #2, and so on. Range is 0 to 100%.
Compressors, Expanders, and Gates
A wide range of Compression and Expansion effects is available in KDFX. The various
Algorithms include different combinations of:
¥
compressor with soft-knee characteristicÑthe compression action comes in gradually as
the signal level approaches the threshold
¥
compressor with hard-knee characteristicÑthe compression action comes in abruptly
when the signal reaches the threshold
¥
expander
¥
multiband compressor that breaks the signal up into three frequency bands and
compresses them all separately
¥
sidechain or output EQ
¥
reverb and compressor in combination
¥
gate
¥
gated reverb
All of the Compression Algorithms use these parameters:
FdbkComprs
(Feedback Compression) selects whether to use feed-forward (set this to ÒOutÓ)
or feed-back (set this to ÒInÓ) compression. The feed-forward conÞguration uses the input
signal as a side-chain source, which is useful when the compressor has to act really quickly. The
feed-back conÞguration uses the compressor
output
as the side-chain source, which lends itself
to more subtle, but not as quick-reacting, compression.
Atk
(Attack)
Time
for the compressor is adjustable from 0.0 to 228.0 ms.
Rel
(Release)
Time
for the compressor is adjustable from 0 to 3000 ms.
SmoothTime
smooths the output of the expanderÕs envelope detector by putting a lowpass
Þlter in the control signal path. Smoothing will affect the Attack or Release times only when this
parameter is longer than one of the other times. The range is 0.0 to 228.0 ms.
Signal Dly
(Delay) puts a small delay in the signal relative to the sidechain processing, so that
the compressor (or gate) ÒknowsÓ what the input signal is going to be before it has to act on it.
This means the compression can kick in before an attack transient arrives. In the
SoftKneeCompress and HardKneeCompress Algorithms, delay is really only useful in feed-
forward conÞguration (FdbkComprs is ÒOutÓ). For other compressors, the delay can be useful
in feedback conÞguration (FdbkComprs is ÒInÓ). The range is 0 to 25 ms.
Ratio
is the amount of gain reduction imposed on the compressed signal, adjustable from 1.0:1
(no reduction) to 100:1, and Inf:1.
Summary of Contents for KDFX
Page 56: ...Inside KDFX Saving Studios and other objects 3 24...
Page 76: ...Real time Control of KDFX KDFX in Auto Mode 4 20...
Page 94: ...Using the Algorithms FXMod Diagnostic 5 18...
Page 104: ...Special Topics Using the Internal Effects 6 10...
Page 118: ...KDFX Objects KDFX Studios Appendix A 14...
Page 154: ...KDFX Controller Assignments in Programs Setups Appendix B 36...
Page 158: ...System Exclusive Control of KDFX Parameters Appendix C 4...
Page 164: ...Index 6...
