Hey, all.
This thread never ceases to amaze me. Speaking as a lurker who is responsible for a decent hunk of the near 70,000 visits, i've loved every minute of it.
Anyway:
PSW, the dist/feedbacker works on a type of logic chip called a 'phase locked loop'. Basically it samples the incoming frequency and outputs a related frequency, be it unison, or pitchshifted through clocking the chip differently. The outgoing waveform is a pulse wave, and on the Boss it is filtered to make it sound like guitar feedback.
For those interested, I think I got the schematic from www.freeinfosociety.org
So, maybe it could be adapted for a sustainer, but it seems to me a complex and counter-intuitive method. The Ruby/Fetzer seems like a much more simple method. The PLL may or may not introduce phase problems, I'm not too certain, but it *is* a *phase locked* loop...
Anyway, peace out.
Simon.
