Re: [sc-users] FFT time stretching

["Hector Centeno" <hcengar@xxxxxxxxx>]

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
> */
>
>
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