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[Guido Goebertus]

Gene wrote:

>List,
>
> A recent thread about waveform synthesis reminded me of an  idea I had
>about 25 years ago when I was into synths. I wanted to build a single
>voice channel (ala Moog).

You could still use the vocoder idea. I thought this over for as many years. (Well, almost:-).
You'll need to program a DSP with a lot of bandpass filters if you want to do this digital. You'll also need a (digital) sawtooth to process.
This, to my knowlegde hasn't been done before to process a single voice. But it would certainly sound very different compared to additional synthesis, because it  is still subtractive, like analog synths.
I am working on this right now, but analog for the moment.
Maybe later I decide to programm my DSP-board.

Regards, Guido