[PD] I wanna sing like Paris

Pierre Massat pimassat at gmail.com
Tue Aug 17 13:52:57 CEST 2010

I don't understand this cycle and zero-crossing thing...

2010/8/17 Roman Haefeli <reduzent at gmail.com>

> On Tue, 2010-08-17 at 12:59 +0200, martin brinkmann wrote:
> > i will try this when i have found a way to extract
> > single-cycle waves from audio input in pd...
> Not yet tried it myself, but what about writing live input to a table
> (for instance with [tabwrite~]) in order to have access to the audio
> data with message based objects? With those it should be fairly easy to
> the detect the exact position of a zero crossing. For finding a single
> cycle, it would be sufficient to find a positive crossing - for
> instance-  and from there find the next one, so you have the exact end
> points of one single cycle.
> Of course, there might be waveforms which have several zero crossings
> per cycle, but the above approach might be a start.
> Roman
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