[PD] Function generator / Signal Generator expr~ and cycle~
Rick T
ratulloch at gmail.com
Tue Sep 6 12:28:02 CEST 2011
Greetings All
I'm trying to create a function generator that uses equations (small
equations on this one.) and have the audio played and plotted.
An example of an equation would be the sine wave equation y=a*sin(f*t+p)+v
a=amplitude, f=frequency, t=time, p=phase, v=vertical offset.
I looked up in the example and found cycle~ which said "tablelookup
oscillator or function generator" but not sure where to put the expr~
I would think it would go like this. but of course the syntax must be wrong.
expr~ $f1+sin*(($f2*$f3)+$f4)+$f5

cycle~
a=$f1=amplitude, f=$f2=frequency, t=$f3=time, p=$f4=phase, v=$f5=vertical
offset.
Please note the equations will not just be a simple sinewaves they will have
cos, tan, atan, etc but be no more than 4 lines long. I also plan on
connecting the $f1,$f2,$f4,$f5 variables to a usb midi controller to vary
the values as the audio signal is played in realtime.
aloha
Rick

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