[sdiy] Prophet VS a phase accumulator design?

[Scott Nordlund]

> ? So the ESQ1 are fixed and the PV-S the same then?
> I tought we hade come to the conclushion a phase acc
> would be seen as variable sample rate despite the fixed
> rate computation? No?
>
> Ahh, had no idea the PPG was fixed rate osc. ;)

I think almost every sane (i.e. not Fairlight/Synclavier)
polyphonic implementation is fixed rate, just some are
high frequency. And as I said before, if you increment
on integer divisions of the (high) clock frequency then
the two cases become equivalent despite "fixed" clock
rate, just with less pitch resolution. But this is too
fast to permit a multiplexed DAC.

Where I'm less clear is the Emulator/Emax stuff. Older
variable rate samplers like the Fairlight required a
separate sample RAM per voice, but the Emulator
apparently kept the fixed sample rate, using a single
shared bank of RAM and apparently some sort of DMA and
small RAM buffer per voice. I haven't seen any 
documentation, obviously, but this should put the Emax
in a uniquely desirable position (cheap, variable rate, 
analog processing).