EG + Triggers = A module

Roy Tate roytate at ionet.net
Wed Dec 11 07:30:31 CET 1996


I've been kicking an idea around for a while, and I thought I would share 
it with all of you.  I was thinking about patching and the timing of 
various events, and I thought up this idea - an envelope generator with 
trigger outs that correspond to the termination of each slope.  So as to 
avoid any confusion, I'm going to spell the whole ADSR sequence out.

1.  Gate signal received
2.  Attack phase starts
3.  Decay phase starts and a trigger out signal is generated
4.  Sustain phase starts and a trigger out signal is generated
5.  Gate signal is removed
6.  Release phase starts and a trigger out signal is generated
7.  Release phase ends and a trigger out signal is generated

This is in effect an envelope sequencer, in that the various triggers could 
be used to start other events that would syncronize with the way notes were 
played on the keyboard.  I don't know if this idea has already been tried 
out, but I always want the option to add more "animation" to sound.  I came 
up with this idea while reading about Gene Stopp's Relay EG as described on 
Ric Miller's web site.  Initially, I thought one could just tap off of the 
relay for triggers.  I have wavered back and forth between gates and relays 
for these output signals ... there are a number of variations possible here, 
and perhaps a more experienced builder (with more time!) might want to try 
this one out.

Suggested name:  Triggering EG

Some applications
 - a filter sweep during the sustain portion of the EG
 - chain several triggering ADs together for an ADADSR
 - delayed auto-pan by triggering an LFO to 2 VCAs 
  (using normal and inverted signals)

Peace,

Roy Tate
roytate at ionet.net




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