User Guide

FXAlg #901: TrigEnvelopeFilt
Algorithm Reference-119
PAGE 2
Wet/Dry The amount of modulated (wet) signal relative to unaffected (dry) signal as a percent.
Out Gain The overall gain or amplitude at the output of the effect.
FilterType The type of resonant Þlter to be used. May be one of ÒLowpassÓ, ÒHighpassÓ,
ÒBandpassÓ, or ÒNotchÓ.
Min Freq The base frequency of the resonant Þlter. The Þlter resonant frequency is set to the base
frequency while the signal envelope is below the threshold.
Max Freq The frequency of the resonant Þlter that can be reached when the envelope follower
output reaches full-scale. The resonant frequency will sweep with the envelope from the
base frequency, approaching the limit frequency with rising amplitudes.
Resonance The resonance level of the resonant Þlter. Resonance sets the level of the resonant peak.
In the notch Þlter, this sets the amount of cut, so 0 dB provides the highest, widest notch,
and higher levels make the notch increasingly narrower and shallower.
Trigger The threshold at which the envelope detector triggers in fractions of full scale where 0dB
is full scale.
Retrigger The threshold at which the envelope detector resets such that it can trigger again in
fractions of full scale where 0dB is full scale. This value is only useful when it is below
the value of Trigger.
Env Rate The envelope detector decay rate which can be used to prevent false triggering. When
the signal envelope falls below the retrigger level, the Þlter can be triggered again when
the signal rises above the trigger level. Since the input signal can ßuctuate rapidly, it is
necessary to adjust the rate at which the signal envelope can fall to the retrigger level.
The rate is provided in decibels per second (dB/s).
Rel Rate The downward slew rate of the triggered envelope generator. The rate is provided in
decibels per second (dB/s).
Smth Rate Smooths the output of the envelope generator. Smoothing slows down the envelope
follower and can dominate the release rate if set lower rate than this parameter. You can
use the smoothing rate to lengthen the attack of the generated envelope which would
otherwise have an instant attack. The rate is provided in decibels per second (dB/s)
Trigger -79.0 to 0.0 dB Env Rate 0.0 to 300.0 dB/s
Retrigger -79.0 to 0.0 dB Rel Rate 0.0 to 300.0 dB/s
Smth Rate 0.0 to 300.0 dB/s
E
-dB 60 40 * 16 * 8 4 0