PhiDjee

I move this topic from MaxMSP "Guitar tone, Fiddle~ etc.":

> You need the #include, and you have to vDSP_create_fftsetup(),

> the rest depends more or less how your code works.

You already know that this code is based on Stephan M. Bernsee "smbPitchShift.cpp" v1.2. 

From my point of view, I don't know any other code providing a so fast pitch-tracker, here embedded in a pitch-shifter.

On a fast machine (G5 dual or Quad, Mac Pro), it can be used for real-time processing (latency < 10 milliseconds) when playing a musical instrument such an electric guitar or an electric violin.

All known bugs have been fixed and successfully recompiled in Xcode 2.4.

Well, is it worth looking at this code to translate part of it into a MaxMSP external, or not?

I have the free time for, but for what result in MaxMSP?

Could I expect a same performance as an MSP external versus a 'pure' AU plug-in?

vDSP_create and vDSP_destroy are (See vDSP.h in Xcode):

    // create an FFT coefficient setup if necessary

        vDSP_destroy_fftsetupD(mFFTSetup);

    mFFTSetup = vDSP_create_fftsetupD(fftLog2n, 0);

Olaf Matthes replied:
----------------------------------------
> You need the #include, and you have to vDSP_create_fftsetup(),
> the rest depends more or less how your code works.
----------------------------------------

You already know that this code is based on Stephan M. Bernsee "smbPitchShift.cpp" v1.2. 
From my point of view, I don't know any other code providing a so fast pitch-tracker, here embedded in a pitch-shifter.
On a fast machine (G5 dual or Quad, Mac Pro), it can be used for real-time processing (latency < 10 milliseconds) when playing a musical instrument such an electric guitar or an electric violin.
Tested on a G5 Quad 2*2.5gHz.

Well, is it worth looking at this code to translate part of it into a MaxMSP external, or not?
I have the free time for, but for what result in MaxMSP?
Could I expect a same performance as an MSP external versus a 'pure' AU plug-in?

In advance, thanks for your insights.
Kind wishes,
Philippe
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vDSP_create_fftsetupD()
vDSP_destroy_fftsetupD()

* Availability:
* Mac OS X:         in version 10.2 and later in
  vecLib.framework
* CarbonLib:        not available
* Non-Carbon CFM:   not available
----------------------------

	// create an FFT coefficient setup if necessary
	if(mFFTSetup != NULL) {
		vDSP_destroy_fftsetupD(mFFTSetup);
		mFFTSetup = NULL;
	}
	mFFTSetup = vDSP_create_fftsetupD(fftLog2n, 0);

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New pitch-tacker & Accelerate framework