Kurzweil Forte - Manual (Page 147)

Program Edit Mode
The Amplitude Envelope (AMPENV) Page
7-50
You’ll tweak the parameters on the AMPENV page when you want to shape the amplitude
characteristics of your sounds. A graphic view of the amplitude envelope will appear on the
display to give you a visual sense of the envelope’s characteristics. The dots along the envelope
graphic indicate the breakpoints between the envelope’s various segments.
The AMPENV page’s top line gives you the usual location reminder, points out the currently
selected layer, and tells you the relative scale of the envelope’s graphic view. The envelope
graphic shrinks in scale as the segment times get longer. This auto-zoom feature maximizes
the available display space. Try lengthening one of the segment times. The envelope graphic
will stretch to fill the display from left to right. When it fills the display, it will shrink to half
its size, and the top line will indicate that the scale has changed (from [1/1] to [1/2], for
example).
Each of the user envelope parameters on this page has two values, as listed below. For the
envelope segments, the first (upper) value is the duration of the segment, and the second is
the amplitude level at the completion of the segment. For the Loop parameter, the values
define how the envelope loops, and how many times the loop cycles.
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.