[sdiy] Additive Synthesis questions

[Ian Smith]

> Ian -- There's nothing different between the output stage of a digital additive synthesizer and one that uses sampled waveforms or wavetables or whatnot. They all use a D/A converters.

That makes life easier

> I also gotta warn you that additive is really not that rewarding unless you have an awesome filter, or have some way to dynamically control the relative pitch and amplitude of individual harmonics. 

ok, so here's the scheme that has popped up in my head... probably post something more detailed later when I have time to sketch it out...

- Use a RAM chip to store the waveform that's user programmable.
- send that to a D/A converter (I live in the 8-bit world so we'll go with that for now)
- send that waveform to a Divide by X chip to get different harmonics out
- harmonic outputs to separate envelope generator/VCA combos
- mix it all back together and watch the lights blink... because obviously there's going to be a lot of LEDs

Now, is there a way to vary the pitch of the harmonics coming from the divide by X outputs?

-Ian (just got another project on his plate) Smith
 		 	   		  
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