[sdiy] BLIT/BLEP virtual analogue synthesis

Olivier Gillet ol.gillet at gmail.com
Tue Aug 3 17:41:29 CEST 2010


> Not if you want sync or any real modulation

True, though 2 BLEP oscillators on an AVR seems a bit out of reach. On
a 16-bit dsPic, maybe...

> The problem here is numerical accuracy

With integration, yes.

> No, but your distortion pedal can and then you can too.

Hmmm, couldn't we use the same argument to dismiss the use of 44.1kHz
as a sample rate for audio gear, arguing that if the output is passed
through the right chain of modulators or octave shifters, everything
above 22kHz could be shifted into the audio range, and must thus be
preserved?

> Can't you fix that with a multisampled BLEP table?

Correct me if I'm wrong, but at 8kHz you'd still be summing over a few
tails of bleps to generate a mere sine wave (= the "expected" output
of a band-limited synthesis of a 8kHz square with sr=44.1kHz)

Olivier



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