Sequential PRO 3, User Manual

Page: 41 / 168

29 Pro 3 User’s Guide Filters
TAB 3 - ADSR
A:25
Attack Sustain Decay Release
D:36 R:44 S:52
ADSR Env Amt Filter Misc Filter
Attack: 0...127
—Sets the attack time of the envelope. The higher the
setting, the slower the attack time and the longer it takes for the filter to
open from the level set with the filter
cutoff
knob to the level set by the
filter envelope amount. Percussive sounds typically have sharp (short)
attacks.
Decay:
0...127
—Sets the decay time of the envelope. After a sound
reaches the filter frequency set at its attack stage,
decay
controls how
quickly the filter then transitions to the cutoff frequency set with the
sustain
knob. The higher the setting, the longer the decay. Percussive
sounds, such as synth bass, typically have shorter decays (and a generous
amount of low-pass filter resonance).
Sustain: 0...127
—Sets the filter cutoff frequency for the sustained
portion of the sound. The sound will stay at this filter frequency for as
long as a note is held on the keyboard.
Release: 0...127
—Sets the release time of the envelope. This controls
how quickly the filter closes after a note is released.
The description of envelope behavior just given is true when the
amount
param-
eter is set to a positive value. But since this control is actually bipolar, it is possible to
set a negative amount of modulation. In this case, the envelopes are inverted and their
behavior changes. The best way to get a feel for the difference is to experiment with
both positive and negative settings of the
amount
parameter.
The cutoff frequency setting may limit the effect of the envelope on the filter. For
example, in low-pass filter mode , if
cutoff
is at its highest setting, a positive envelope
amount will have no effect on the filter since the filter is already completely open.