ODP: AW: Harmonix content formula

[Paul Maddox]

Roman,

>But when you say FFT is a headache I have to dissagree.

depends, if you wanna do it in assembler.

>I'd say it is fun (see how dorky I am). You could probably find many
>examples
>of software (I mean source code) calculating FFT, or even write your own
>when you learn the FFT itself. It is rather simple and logical IMHO.
>And FFT examples for DSPs are just laying around everywhere.

ahhh, but I dont intend to di tin a DSP, on a microcontroller, though not 
real time.

>If anyone is interested in C code for it, I'd be pleased to share with you.
>Not too efficient code, but works (for Windoze).

wish I understood C

>BTW, I've heard of strange ppl doing FFT in hardware (8-O
>using FPGA chips. It was also one of the project in my University,
>but I don't know if they succeded.
>

sounds cool...

>Now I have dangerously silly idea - DCT in analog hardware:
>(Discrete Cosine Transform - simplifed version of Discrete Fourier
>Transform)
>say, 32 sine oscilators of harmonic frequencies (or not harmonic - why 
>stick
>to the original?), 32 multipliers (ringmods) multiplying input signal with
>each of
>32 sine oscs (or one muxed), 32 envelope followers and we have harmonic
>content output.
>

thants a lot of circuitry for what is essentially ONE oscilator, now make it 
polyphonic!!! Instant wardrobe sized synth..


What I want to do is make a polysynth, that will use wavetables to playback 
sound... but.. the tables are generated by a processor, douring a FT fade 
between TWO (or more) waveforms held in a rom.

Paul




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