Dave Smith Instruments Prophet REV2 Mode D'emploi page 56

Filter Envelope
(DADSR). The Filter Envelope is used to shape the harmonic charac-
attack, decay, sustain, and release stages (plus a delay parameter to delay
the onset of the envelope).
This is one of the most important aspects of designing a sound. Without
sound. That's not very interesting to listen to and it's not how instruments
behave in the real world.
In general, sounds produced by an instrument are brighter at their begin-
ning (the attack stage) and grow mellower as they die out (the decay and
release stages). In other words, their harmonic content changes over time.
CUTOFF RESONANCE
4 POLE DELAY
Filter Envelope
note on
Time
A typical 5-stage DADSR envelope
24 Filter Envelope
LOW-PASS FILTER
ENV AMOUNT VELOCITY
ATTACK DECAY
note off
KEY AMOUNT AUDIO MOD
SUSTAIN RELEASE
Dave Smith Instruments