Kurzweil K2661 Musician's Manual page 94

Program Mode and the Program Editor
The Amplitude Envelope (AMPENV) Page
Many programs feature User envelopes with appropriate envelope settings. This is usually the
case for programs that use samples of acoustic instruments, since it provides a convenient
starting point for you to adjust the envelopes.
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 small horizontal
arrow represents the end of the decay section. The small downward-pointing arrow represents
the beginning of the release section.
Because the K2661's ROM samples are stored in a compressed format, applying an altered
amplitude envelope can change more than just the amplitude of your sound, since it also
changes the rate at which the samples are decompressed for playback. When the samples are
made to play back with altered envelopes, the timbres can evolve in new and interesting ways.
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 parameter 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
Attack Segment 1, 2, 3
Decay Segment
Release Segment 1, 2, 3
Loop
6-36
Parameter
Time
Level
Time
Level
Time
Level
Type
# of loops
Range of Values
0 to 60 seconds
0 to 100%
0 to 60 seconds
0 to 100%
0 to 60 seconds
0 to 100%
Off, Forward, Bidirectional
Infinite, 1 to 31 times