[linux-audio-user] extreme time stretching

[Eric Dantan Rzewnicki]

On Mon, Mar 15, 2004 at 09:48:05PM +0000, Steve Harris wrote:
> On Mon, Mar 15, 2004 at 10:21:00 +0100, Frank Barknecht wrote:
> > Hallo,
> > Erik de Castro Lopo hat gesagt: // Erik de Castro Lopo wrote:
> > 
> > > On Mon, 15 Mar 2004 15:21:01 -0500
> > > Eric Dantan Rzewnicki <rzewnickie at rfa.org> wrote:
> > > > For the purposes of time stretching or
> > > > compressing sound, how does it compare to the way Erik's SRC or
> > > > SoundTouch work? 
> > >
> > > SoundTouch is a true pithc independant time stretcher.
> > 
> > I think, Soundtouch uses a Fourier-based approach. Granular synthesis
> > isn't really the best method of clean time stretching, I just
> > mentioned it as one example of a technique, that can be used to do
> > extreme streches. 
> 
> Soundtouch uses WSOLA, which is similar to granular synthesis, its not 
> fequency domain like FFT or wavelets.
> 
> - Steve

Waveform Similarity Overlap Add?

http://bmrc.berkeley.edu/courseware/cs298/spring00/Ponceleon/Dulce/index4.htm

(not that i can claim to understand that picture ... :-/ )

-Eric Rz.