[sdiy] Prophet VS a phase accumulator design?

karl dalen dalenkarl at yahoo.se
Wed Feb 2 20:48:58 CET 2011


> The sample rate scales with the number of active
> oscillators and on the ESQ1/SQ80 is 1MHz/(24+2)=38.462 kHz
> -- on Mirage's SoundProcess it drops down to
> 1/(32+2)=29.412kHz due to 32 active oscillators.
> 
> So for a PPG-like rate, you'd need to restrict the DOC to 3
> active oscillators (plus 2 refresh cycles), hence
> 1MHz/(3+2)=200kHz.

Thanks for the info Rainer!

So the low clock speed and long samples are the reason for the ESQ1
jittery results? Would the DOC chip have sounded better if they had
used the 256 mode x 24osc only?





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