44 45Amplier Envelope
Sequential Prophet X User’s Guide
Amplier Envelope
To create a “gated VCA” effect, set the env amount of the Amplier to zero,
route the LFO square wave to amp with an amount setting of 100% and hold a note.
Velocity On/Off: On, Off—Allows key velocity to inuence volume. If
on, the harder you play, the more the louder sound will be. If off, key
velocity will not affect the volume. This control allows for more touch-
sensitive sounds.
Additional Amplier Parameters (Display Menus)
Additional Amplier Envelope parameters are accessible through the
menus in the main display. To see these menus, adjust any of the controls
in amp portion of the envelopes section of the front panel.
TAB 1 - VCA ADSR
A:25
Attack SustainDecay Release
D:36
R:44
S:52
Vol/Pan LPF MiscVCA Env AmtVCA ADSR
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 a sound to
reach its full volume. Pads typically have softer (longer) attacks. Percus-
sive sounds have sharper (shorter) attacks.
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.
TAB 2 - VCA Env Amount
Amt:0
Attack DelayDecay Env Repeat
Vel On/Off: On
Rept:Off
Del:0
Vol/Pan LPF MiscVCA Env AmtVCA ADSR
Amount: 0...127—Sets the amount of modulation from the Amplier
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.
Velocity On/Off: On, Off—Allows key velocity to inuence volume. If
on, the harder you play, the more the louder sound will be. If off, key
velocity will not affect the volume. This control allows for more touch-
sensitive sounds.
Delay: 0...127—Sets a delay between the time the envelope is triggered
(note on) and when the attack portion actually begins.
Env Repeat: Off, On—When on, the Delay, Attack, and Decay segments
of the envelope repeat. Sustain still affects the level at which the Decay
segment ends, but instead of sustaining at a xed level while a note is
gated on, Delay, Attack, and Decay loop until the note is turned off. The
Release segment begins when the note is gated off, just as it does when
Repeat is off.