Alesis Micron Reference Manual page 88

6
Programs
Loop
These settings determine how the envelope is used when notes are
held down (sustained).
off
The envelope acts normally. (When the end of the envelope is
reached, the note stops playing.)
attack/decay
The envelope loops through the attack and decay stages. (If
Freerun is on, the envelope will even continue looping after you
release the note. You will usually only want to use this
configuration with your filter or pitch/mod envelopes. If you set
up the amp envelope to loop forever, you'll only be able to stop it
by playing a lot of other notes at once to steal the voice.)
entire envelope
The envelope loops through the entire envelope. As in
attack/decay, if Freerun is on, the envelope will continue looping
after you release the note.
while note held
The envelope loops through the attack and decay stages, but only
while the note is held down, regardless of the Freerun setting.
Sus Pedal (Sustain Pedal)
on
The Micron treats the sustain pedal as if you are holding notes
down on the keyboard, keeping notes within the sustain section of
the envelope as long as the sustain pedal is held down.
off
The Micron ignores the sustain pedal relative to the envelope.
The envelope goes into the release stage when the note is released.
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