Re: [sc-users] FFT time stretching

[Joshua Parmenter <josh@xxxxxxxxxxxxxxxxx>]

Yes... you'll be able to save FFT data to a buffer in real-time,  
right it out, and play it back with variable speed.

I'll check out the link in the next couple days. Thanks.

Josh

On Oct 18, 2007, at 10:25 PM, Hector Centeno wrote:

> Thanks again, Josh.
>
> The format used by Csound5 is described here:
> http://www.cs.bath.ac.uk/~jpff/NOS-DREAM/researchdev/pvocex/ 
> pvocex.html
>
> Even though It says that only mono analysis files are supported, now
> stereo files can be created and read (one channel at a time).
>
> So, does that mean beside the ones available in sc3-plugins you are
> building new ones that will allow to read SCs FFT format files?
>
> Cheers,
>
>
> Hector
>
> On 10/19/07, Joshua Parmenter <josh@xxxxxxxxxxxxxxxxx> wrote:
> > PVSynth doesn't do an FFT resynth, but a sin osc bank resynthesis.
> > I'm not sure what the changes between the csound4 pv files and the
> > csound 5 pvx files are, but it may not be much work to get these to
> > work. Do you know where a file description of pvx files are?
> >
> > The one's I am building right now for SCs FFT ugens will use SCs FFT
> > format.
> >
> > Best,
> >
> > Josh
> >
> > On Oct 18, 2007, at 9:24 PM, Hector Centeno wrote:
> >
> > > Sorry, one more question:
> > >
> > > Would it be possible to use PVFile to read Csound's PVX files and  
> > > then
> > > transform the data using the Supercollider FFT UGens? I know that  
> > > PVX
> > > files are amplitude+frequency and looks like SC uses amplitude+phase
> > > for the FFT UGens, am I right? Would that make them incompatible,
> > > unless the data is converted? Sorry if I'm asking too obvious of a
> > > question.
> > >
> > > Thanks,
> > >
> > > Hector
> > >
> > >
> > >
> > > On 10/19/07, Hector Centeno <hcengar@xxxxxxxxx> wrote:
> > > > Thanks Joshua for your response. I guess they will work in Linux,
> > > > right?
> > > >
> > > > Cheers,
> > > >
> > > >
> > > > Hector
> > > >
> > > >
> > > > On 10/19/07, Joshua Parmenter <josh@xxxxxxxxxxxxxxxxx> wrote:
> > > > > Hi Hector,
> > > > >
> > > > > I'm actually working on some UGens right now to do this. There are
> > > > > still some bugs to work out though.
> > > > >
> > > > > Also, in my lib are some UGens that use CSound 4s pv files. These
> > > > > are
> > > > > PVFile, PVSynth and PVInfo. You can get them in the JoshUGens at:
> > > > >
> > > > > http://sourceforge.net/projects/sc3-plugins/
> > > > >
> > > > > Best,
> > > > >
> > > > > Josh
> > > > >
> > > > > On Oct 18, 2007, at 9:00 PM, Hector Centeno wrote:
> > > > >
> > > > > > Hello,
> > > > > >
> > > > > > I'm just starting to learn Supercollider and I would like to
> > > > > > know if
> > > > > > it is possible to do time stretching using FFT data. I've done
> > > > > > that in
> > > > > > Csound using PVX files and reding them using a variable speed
> > > > > > pointer,
> > > > > > changing the speed in realtime. Is it possible to do this in SC?
> > > > > >
> > > > > > Thanks!
> > > > > >
> > > > > >
> > > > > > Hector
> > > > > > _______________________________________________
> > > > > > sc-users mailing list
> > > > > > sc-users@xxxxxxxxxxxxxxx
> > > > > > http://www.create.ucsb.edu/mailman/listinfo/sc-users
> > > > >
> > > > > ******************************************
> > > > > /* Joshua D. Parmenter
> > > > > http://www.realizedsound.net/josh/
> > > > >
> > > > > "Every composer – at all times and in all cases – gives his own
> > > > > interpretation of how modern society is structured: whether  
> > > > > actively
> > > > > or passively, consciously or unconsciously, he makes choices in  
> > > > > this
> > > > > regard. He may be conservative or he may subject himself to
> > > > > continual
> > > > > renewal; or he may strive for a revolutionary, historical or  
> > > > > social
> > > > > palingenesis." - Luigi Nono
> > > > > */
> > > > >
> > > > >
> > > > > _______________________________________________
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> > >
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> >
> > ******************************************
> > /* Joshua D. Parmenter
> > http://www.realizedsound.net/josh/
> >
> > "Every composer – at all times and in all cases – gives his own
> > interpretation of how modern society is structured: whether actively
> > or passively, consciously or unconsciously, he makes choices in this
> > regard. He may be conservative or he may subject himself to continual
> > renewal; or he may strive for a revolutionary, historical or social
> > palingenesis." - Luigi Nono
> > */
> >
> >
> > _______________________________________________
> > sc-users mailing list
> > sc-users@xxxxxxxxxxxxxxx
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>
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******************************************
/* Joshua D. Parmenter
http://www.realizedsound.net/josh/

“Every composer – at all times and in all cases – gives his own  
interpretation of how modern society is structured: whether actively  
or passively, consciously or unconsciously, he makes choices in this  
regard. He may be conservative or he may subject himself to continual  
renewal; or he may strive for a revolutionary, historical or social  
palingenesis." - Luigi Nono
*/