[PD] [soundtouch~] pitch shifter for Pure Data

[maex at firstfloor.org]

he katja.

super work. thank you!

m


On Sun, Aug 21, 2011 at 09:00:24PM +0200, katja wrote:
> Hello,
> 
> A few weeks ago I was reminded of my promise to share [soundtouch~], a
> SoundTouch port for Pure Data. I use this class since quite some time now,
> and had the code available on my website earlier on, but when I found that
> it could not work for Linux 64 bit I withdrew the project for a while.
> Reportedly, Olli Parviainen's newest version of SoundTouch is ready for 64
> bit. I can not check this as I have no access to a 64 bit machine at the
> moment. Anyway, I have built [soundtouch~] binaries for OSX(fat), Linux32
> and Windows32, and uploaded it together with source and help patch:
> 
> http://www.katjaas.nl/pitchshift/soundtouch~.html
> 
> SoundTouch is a time domain pitch shift  / time stretch library, and I've
> built it into [soundtouch~] as a real time pitch shifter. It is suitable for
> the transposition of material with simple harmonic content, like voice,
> flute etc. The SoundTouch library is not perfectly adapted to real time
> processing, because you have to choose (at compile time!) between a build
> which produces dropouts during pitch factor change, and a build which has
> increased latency. I opted for the clicks instead of the increased latency
> (which is by necessity already considerable) in my binaries distribution,
> but if you want you can recompile according to your preference. To solve
> this clicks-vs-latency issue, if possible at all, would require a
> modification of the SoundTouch library itself.
> 
> Apart from this issue, I'm fairly content with [soundtouch~]. Let me know
> what you think about it. If [soundtouch~] is considered a useful addition to
> existing Pd methods for pitch shifting, it may be worth the effort to try
> and solve the clicks-vs-latency issue. It is not a trivial task though.This
> time I'm not promising anything.
> 
> Katja.

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