[sdiy] Prophet VS a phase accumulator design?

Scott Nordlund gsn10 at hotmail.com
Thu Feb 3 23:20:52 CET 2011


> > 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 meant to say variable sample rate here, I didn't notice
the brain fart...

> My guess would be they're using a phase accumulator, just the like PPG
> does to play back samples (remember the wave 2.2 and 2.3 could
> playback samples recorded using the Waveterm).

I dunno, I just vaguely remember them advertising that 
the Emax could transpose over 8 octaves without aliasing, 
or something like that, and I've lately been somewhat 
obsessed with the "best of both worlds" combination of 
zero order hold harmonic images on the low end and no
aliasing on the high end.
 		 	   		  


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