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>Okay, here are some thoughts on modules that change harmonic spacing.
>For a modifier, what about something that basically does what a ring
>modulator does (but not through simple multiplication obviously)---change
>the spacing between harmonics plus or minus---but along a controllable
>curve. Is that clear? I'm fumbling for language here. A ring modulator
>up expanding or contracting the harmonic spacing in a linear way, and
>because pitch has an exponential relationship to frequency, we get the
>metallic non-harmonic sound. What if you could do something similar, but
>with "curves" that could be voltage-controllable? As well as the deviation
>Hope that description makes some kind of sense. Due to the nature of a
>modulator, the higher harmonics in the upper sideband get affected more
>the "closer" ones, and the reverse for the lower sideband. If you could
>control the effect along a curve, you could really control the effect and
>make it very subtle. At close to exponential I think it would approximate
>pitch shifter. At linear, it would create the upper sideband of a ring
>and inverse linear, the lower.
>For an additive source module, I guess some kind of high-frequency VCO
>feeds, say, eight "divide-by-N" chains that can divide by large numbers.
>Each of these eight chains goes to a VCA and a square-to-sine waveshaper
>are then mixed. These modules could be ganged to add more harmonics off
>same source VCO (or maybe the HF VCO is one module, like a 'driver,' and
>there's a second module for the divider banks that can all be fed from
>driver). I realize that this gets to be a lot of circuitry. Probably more
>expensive than eight VCOs. But with these things feeding off the same clock
>they are locked tight in "tune." Ideally you'd want to be able to specify
>the phase of each harmonic, too, but that's getting to be crazy.
>Anyway, that's first pass at daydreaming. I wonder what that first module
>would sound like. I bet it would be a very weird choruser if used subtly
>mixed back in with the original signal.