Date: Sat, 14 Feb 87 11:45:13 EST
From: yerazuws@csv.rpi.edu (Crah)
Message-Id: <8702141645.AA08261@csv.rpi.edu>
To: esq@ucbarpa.Berkeley.EDU
Status: O

	
Here's a "fun" patch, good as a special effect.  I don't like an envelope
on my specials, as I prefer to do the enveloping from the mixing board, 
but you can change ENV4 to be as you wish.
	
Patch name  :VADER
OSC1: 0 000 00 NOISE2 LF01 +63 *OFF* 00
OSC2: -3 00 00 PULSE *OFF* 00 *OFF* 00
OSC3: -3 00 00 PULSE *OFF* 00 *OFF* 00
DCA1: 63 ON LF03 -35 *OFF* 00
DCA2: 26 ON LFO3 -63 *OFF* 00
DCA3: 00 OFF ----------------
FILT: 000 14 40 LF02 +15 *OFF* 00
DCA4: 08 63 *OFF* 00
LFO1 19 OFF OFF NOI 63 00 63 *OFF*
LFO2: 07 ON OFF SQR 63 00 63 *OFF*
LFO3: 08 ON OFF SAW 63 00 63 *OFF*
ENV1-ENV3: UNUSED, doesn't matter.
ENV4: +63 +63 +63 00 00 00 32 32 20 00
MODE: OFF OFF OFF 00 ON OFF OFF OFF
S/L: OFF PIANO1 OFF PIANO1 OFF PIANO1 60
	
Now play F below middle C.  I'm working on a light-saber patch to go with
this one (split, anyone?)
	
How it works:  We use OSC1 and LFO1 to generate nice clean noise.  
Then, LFO3 is used to put a ramp-down on the noise via DCA1.  
Meanwhile, LFO2 is running at half LFO3's speed (this is critical, folks!)
and is providing a square wave to shift the cutoff frequency of FILT.
 
This breathing sounds OK, but we add a mechanical buzz via OSC2.
DCA2's manual setting of 26 makes this come out less strongly, and the
LFO3 modulation at -63 makes it ramp completely away much more quickly than
the noise from OSC1.
 
OSC3 isn't used for anything here.  Likewise, only ENV4 is needed in the
envelope generators.
	
	Enjoy.
 
	-Bill Yerazunis