EURO-SERGE - SYSTEM MODULES
ELBY Designs - Laurie Biddulph
9 Follan Close, Kariong, NSW 2250, Australia
11 of 42
: The
is an envelope generator that can produce
multi-segmented envelopes of a more complex variety than USG is able to
provide. In certain kinds of synthesis this is necessary, since few natural
envelopes are a simple rise and fall. The
is able to provide a four-part
envelope labelled ATTACK, DECAY, SUSTAIN and RELEASE, as in Figure
Figure 5.3.5
This envelope, in a general sort of way, represents the envelope of a trumpet
or any instrument which can sustain a note at a steady level. The sustain
section is settable to different SUSTAIN levels by means of a pot and a
control voltage. In addition to these functions the
also provides a delay
that sets an amount of time between receiving a trigger and the onset of the
envelop itself. This is useful when triggering related envelopes with the same
TRIGGER or GATE.
The module is triggered by a pulse to its [GATE] input. Usually this trigger
comes from a keyboard device such as the
's output which is a trigger
that stays at a +5V level as long as a finger remains on the key:
Figure 5.3.6
The sustained high level will be used in the timing of the
's output.
