[sdiy] Polymoog episode 2 ( 50240 Top Octave Generator IC)

[The Old Crow]

On Wed, 31 Jan 2001, Florian Anwander wrote:

> I also have here a half living half dead Polymoog at home. Also mine is
> missing the TOG. I found once in the Web a page, where a program for a
> PIC was described, that uses the PIC as Top Octave Generator. I now
> tried to find the page again, but missed it. I hope, I printed out some
> informations regarding this project, so I could awake my babe.

  That was one of my experiments, which, while it works, can be done
better.  I'll have to get some Scenix-now-Ubicom SX chips in to tinker
with in an attempt to use concurrent phase-accumulator oscillators.

  If the website still exists, the old example was at:
http://chip.aeug.org/oct54all.asm

  I need to devise a good fine-tuning method for use in
microcontroller-derived TOG tones.  A PLL main clock might be interesting,
but it might do odd things to the processor pipeline.

Crow

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