[sdiy] Random DSP thoughts

[Michael Bechard]

> Inharmonic Oscillator. Venture into pseudo-additive synthesis with an
oscillator whose harmonics are variable in frequency. Be able to have
the harmonics shift over the note duration.

I designed an instrument in CSound that did this. It had 16 harmonics, roughly half of which were harmonic multiples, the rest weren't. I took the initial frequencies and modulated each harmonic with a single oscillator, whose frequency ramped down on the note's attack, as did its amplitude. The result, after clipping (no other effects) and with three instrument instances playing in unison, sounds like this:


http://friends.kunstmusik.com/mbechard/files/lead_clean.mp3

The modulation is randomized and is fairly extreme early in the note's attack. This makes for more percussive notes, especially the very short ones.

Michael Bechard


----- Original Message ----
From: Tim Ressel <madhun2001 at yahoo.com>
To: Synth-Diy <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, January 25, 2009 1:45:41 PM
Subject: [sdiy] Random DSP thoughts

Hey all,

A few ideas of what the heck to do with one of these new-fangled DSP thingies:

Clap Machine. No, not some kind of eeevil experment, but an attempt to make a clap synthesizer that mimics real clapping. A gizmo that takes either samples of claps or just generates claps, and can do rhythmic or random clapping. Can even play with slight delays between the channels to do some spacial stuff. Yeah, I know, it's been done. But not by me. Yet. You see, I hate canned clap machines. Hate, hate, hate. I think we can do better.

VoSim. This is the vowel simulator out of the Chamberlin book. Creates a decaying train of sin^2 pulses with 3 parameters. Might make a fun module.

Drums. A simulation of an actual drum head with the ability to hit anywhere on the surface. Simulates the not-so-harmonics of a drum, the rim, rhe shell, and the stick. Yeah, I know, it's been done. Into the ground it's been done. So what?

Inharmonic Oscillator. Venture into pseudo-additive synthesis with an oscillator whose harmonics are variable in frequency. Be able to have the harmonics shift over the note duration.

Just a few things rattling around in my head. 

--TimR
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