Oberheim Matrix-12 - Env X

ENVX
The MATRIX-12 utilizes five independent 5-stage Envelope Generators that
provide "time dependent" modulation. This means that Envelopes are used
primarily to change whatever parameters are selected in the patch as Modulation
Destinations for a selected time period, which could be mere fractions of a
second to several minutes depending on the setting. Each "stage" of an
envelope, with the exception of SUSTAIN- which sets the Envelopes' current
output level as a key or keys are being held down - operates for an amount of
time that is set with its Amount value.
Envelopes are most commonly used to modulate the frequency of the Filter
(VCF) and the patch's overall loudness (VCA2). In addition, the Envelopes can be
used simultaneously to modulate any one of the remaining 45 parameter
destinations in the Matrix Modulation that require this type of time control.
Although the majority of analog-based synthesizers provide only two Envelope
Generators-one for the VCF and one for the VCA-the MATRIX-12 provides
three additional Envelopes for time-dependent modulation when you need it.
You can combine several Envelope Generators to create complex changes
(modulating a Destination by two or three different Envelopes) or you can
modulate one of the Envelope's parameters by another Envelope - or even itself
-to obtain a timing that is extremely long.
When used as a modulation source, the Envelope starts is cycle when it receives
a trigger - or a kind of "goM signal. Common trigger sources are playing notes on
the MATRIX-12fs Keyboard, notes transmitted from the MIDI Master controller via
MIDI IN, one of the LFOs or an external source through the TRIGGER IN jack on the
back panel.
TIME
128 Matrix-Downer's Manual