Kurzweil Forte - Manual (Page 151)

Program Edit Mode
The Amplitude Envelope (AMPENV) Page
7-54
Source, Depth
These two parameters work together to let you assign a control like the Mod Wheel to affect
the current layer’s amplitude envelope in realtime. The value of the Source parameter defines
which control affects the envelope section, and the value of the Depth parameter defines how
much the rate is multiplied when the control is at its maximum value, 127. No effect is had
when the control is at its minimum value, 0, and Depth values are scaled for controller values
in between.
Note: For each note triggered, you can only set the controller value that will scale
the Depth parameter of an envelope section before that section of the envelope is
triggered. For controllers assigned for Attack, the controller value used will be the last
received before the note is triggered. For controllers assigned for Decay, the controller
value used will be the last received before the final section of the attack envelope
reaches its maximum amplitude. For controllers assigned for Release, the controller
value used will be the last received before the note is released. To put it another way,
for each envelope section, you cannot change the rate of a note’s envelope once that
section of the envelope has been triggered.
Impact
Impact can boost or cut note volume by up to 24 dB during the first 20 milliseconds of the
attack of an envelope. This feature is an easy way to get more “thump” from your bass and
drum sounds.