[sdiy] analog vs digital noise generators

[Colin f]

> Digital: more complex, larger parts count, won't usually need 
> trimming, can 
> produce interesting effects if clock rate is varied. Some 
> patches may also 
> benefit from a repeatable pseudo-random signal rather than a 
> truly random 
> one, and this can only be done digitally.

If you implement a shift register noise generator on a PIC 12F679, you can
have 5 separate noise sources from a single 8 pin DIL IC, with nothing else
but a de-coupling cap on the power pins and DC blocking caps on the outputs.
You could even have different lengths of shift register on each output, so
some loop and others dont.

Cheers,
Colin f