[sdiy] PPG waveforms, was Korg DW synths

[mark verbos]

The Buchla 300 and Touché do that, in hardware. They use XOR gates to  
flip the digital word going to the ram addresses.
I think the Buchla 700 probably does too, but I don't know what's  
inside that one.

Mark



On Jan 4, 2008, at 4:26 PM, paul.maddox.mail-list at synth.net wrote:

> Peter,
>
>> wasn't it the PPG Synths that stored only half the waveform of each
>> cycle and then recreated the other half on playback ?
>
> 'ish.
>
>
> PPG stored waveforms as half cycle, yes.
> But, when you selected a new table, it calculated the negative half  
> cycle
> and the rest of the table and filled it's RAM.
> So playback was full cycle, from RAM, not dynamically.
>
> Paul
>
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