[chuck-users] Time-stretching without changing pitch

[mike clemow]

Hey Kassen,

I'm looking at the examples...  This is quite interesting.  I think
you've mentioned LiSa a few times on this list before.  Could you
maybe give a high-level overview of her for the uninitiated?

Cheers,
Michael

On Sat, Apr 26, 2008 at 9:00 PM, Kassen <signal.automatique at gmail.com> wrote:
>
>
> > Any help is welcome.
> >
> >
>
> Hi, Nuno!
>
> FFT is certainly a option but I think I'd start by trying LiSa. LiSa (LIve
> SAmpling) is a new Ugen that's not in the manual yet but is documented in
> /examples/special/ in your ChucK dir. She (LiSa is a female Ugen, I feel) is
> quite capable of granulating and I think one of the examples there covers
> this. If there isn't one for some unforseen reason we need one, I think.
>
> Any time-streching or pitch-shifting will create artefacts so the trick is
> picking one that suits your material and perhaps fine-tuning it but
> generally speaking LiSa can do this kind of thing if provided with a bit of
> frame-work.
>
> Hope that gets you started. If push comes to shove we could try using FFT to
> detect the most prominent frequency in the source material and use that to
> set the grain length and/or rate, that might be a interesting strategy if
> you'd run into artefacts and this is suitable for the material.
>
> Yours,
> Kas.
>
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