[sdiy] Mighty quiet lately...

Harry Bissell harrybissell at wowway.com
Thu Sep 23 15:12:11 CEST 2010


Just a test to see if the system is working...

I'm playing with LT Spice and simulating guitar pitch converters, listening to
output wave artifacts using the .wav option. Its very cool. It will take a .wav
input, so you could (in theory) record actual guitar waves, and test a system in
software.

The Moog pitch conversion patent is kind of nice, but it has some gritty quality as
the waveform "rolls over".  Guitar folk who have watched a scope will know
what I mean.

To simulate that, I sum

80Hz - 1V
161Hz - .5V
243Hz - .33V

to get more extreme waves, up the harmonic voltages. Try making the sum of the harmonics
equal or greater than the fundamental. If your converter handles that, you've really got something !!!

H^) harry



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