[sdiy] Casio CZ resonant waveforms / Windowed Sync

[Tom Wiltshire]

On 24 Jul 2011, at 15:58, Olivier Gillet wrote:

> A simple way of doing this with counters / DACs / eeproms:
> http://www.flickr.com/photos/alh84001/4254296295/in/photostream

Yep, that's pretty much exactly what I've done in software.

It's worth pointing out that this isn't 'phase distortion' though. The phase distortion part of the CZ is the other waveforms, not the resonant ones. Well, I suppose you *could* see sync as a phase distortion technique, but that's not how it's usually viewed.

(Olivier) Your speculation that there's an extra eeprom lookup step in the upper 'window function' path seems to be confirmed by the Deep Synthesis analysis of the CZ. If you start messing with the sysex, you can select 5 different window waveforms. That's something I haven't tried yet, but I'll have a go with at some point. Any waveform that hides the discontinuity would do, and that basically means any waveform that goes gradually towards zero at the far end. It sounds like the CZ actually includes some others that don't meet that criteria, although the final interface denied access to them.

T.