User Manual

39
Prophet X User’s Guide
Filter Envelope
Envelope Parameters (Front Panel)
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 lter to
open from the level set with the lter cutoff knob to the level set by the
lter envelope amount. Percussive sounds typically have sharp (short)
attacks.
Decay: 0...127—Sets the decay time of the envelope. After a sound
reaches the lter frequency set at its attack stage, decay controls how
quickly the lter 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 lter resonance).
Sustain: 0...127—Sets the lter cutoff frequency for the sustained
portion of the sound. The sound will stay at this lter 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 lter closes after a note is released.
Velocity On/Off: On, Off—Allows key velocity to inuence lter cutoff
frequency. If on, the harder you play, the more the lter will open and the
brighter the sound will be. If off, key velocity will not affect the lter.
This control allows for more touch-sensitive sounds.
Env Amount: -127...127—Sets the amount of modulation from the lter
envelope to the lter’s cutoff frequency. Any setting above zero means
that each time you strike a key, the lter envelope controls how the lter
opens and closes. Higher amounts more dramatically affect the cutoff
frequency. This control is bipolar. Positive settings produce standard
behavior. Negative settings invert the envelope.