Program Edit Mode
The Amplitude Envelope (AMPENV) Page
7-50
Parameter Group
Parameter
Range of Values
Attack Segment 1, 2, 3
Time
0 to 60 seconds
Level
0 to 100%
Decay Segment
Time
0 to 60 seconds
Level
0 to 100%
Release Segment 1, 2, 3
Time
0 to 60 seconds
Level
0 to 150% (Release Segment
3 is always set to 0%)
Loop
Type
Off, Forward, Bidirectional
# of loops
Infinite, 1 to 31 times
Attack Segment Times
These indicate how long it takes for the current layer’s amplitude to reach its final level from
its starting level.
Attack Segment Levels
These are the final levels that each segment achieves at completion. The levels are expressed
as percentages of the maximum possible amplitude for the current layer. Attack segment 1
always starts at zero amplitude, and moves to its assigned level in the time specified by its
time value. So the default settings of 0 seconds and 100% mean that the first segment of the
attack section moves instantly from zero amplitude to 100% amplitude. Increase the time of
Attack segment 1 if you want the sound to ramp up more slowly.
Attack segments 2 and 3 affect the sound only when you set a nonzero value for time. They
will then move to their assigned levels in the time specified. Their starting levels are equal to
the final levels of the preceding segment.
Decay Segment
The decay section has only one segment. It has values for time and level, just as for the attack
section. The decay section begins as soon as the attack section has been completed. It starts
at the same amplitude level as the attack segment preceding it, and moves to its assigned
level in the time specified. You’ll hear a note’s decay section only when the attack section is
completed before a Note Off message is generated for that note.
To create a sustaining envelope, simply set the Decay segment’s level to a nonzero value.
