User Manual

27
Prophet Rev2 User’s Guide
Amplier Envelope
Decay: 0...127—Sets the decay time of the envelope. After a sound
reaches its full volume at its attack stage, decay controls how quickly the
sound transitions to the level set with the sustain control. The higher the
setting, the longer the decay. Percussive sounds, such as synth bass, typi-
cally have shorter decays.
Sustain: 0...127—Sets the sustain level of the envelope. The higher the
setting, the louder the sustained portion of the sound will be. The sound
will stay at this level 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 a sound dies out after a note is released.
Pan Spread: 0...127—Pans the audio in the stereo eld individually
per voice. With a pan spread setting of zero, all voices are panned in the
middle (monophonic). As you turn up
pan spread, the audio in each voice
is gradually moved away from the center by different amounts. Every
other voice goes in a different direction. This provides a wide stereo eld
as you play. Any modulation to Pan will individually move each voice
from its static position as set by the
pan spread setting.
Env Amount: 0...127—Sets the amount of modulation from the Ampli-
er Envelope to the VCA. In most cases you will probably want to set
this fully clockwise for maximum VCA volume. If you experience signal
clipping, try reducing the
env amount.
To recreate the “gated VCA” effect used on certain classic rock anthems,
choose an organ sound, then set the env amount of the Amplier to zero, route the LFO
square wave to
amp with an amount setting of 100% and hold a few chords.
Velocity Amount: 0...127—This enables keyboard velocity to modu-
late the VCA Envelope Amount. It doesn’t enable keyboard velocity to
directly control the VCA (loudness). To do this, see the note below.
To create a program in which velocity controls the VCA, turn vca envelope
amount down and turn velocity amount up. To achieve the best results, it may be
necessary to set an initial level using Envelope Amount. Just remember that once
Envelope Amount is set to the maximum, no modulation from velocity—or any other
source—will cause it to go higher than that.