Re: AudioUnit and FFT
Re: AudioUnit and FFT
- Subject: Re: AudioUnit and FFT
- From: Austin Shoemaker <email@hidden>
- Date: Fri, 27 Feb 2004 12:44:51 -0800
Make sure you look up the packed format that it returns- it's not in
the normal order. Particularly, the real part of the n/2+1th complex
number is packed into the imaginary part of the first. The packing
formats for 1D and 2D FFTs are in the vDSP reference PDF.
Austin
On Feb 27, 2004, at 10:18 AM, Airy Andri wrote:
Have a look to /Developer/Examples/Accelerate/vDSP/vDSPExamples.
There are some FFT sample code using vDSP here.
Airy
Le 27 fivr. 04, ` 15:53, Vincent Verfaille a icrit :
Dear all,
I am a newbie in Objective-C and Audio-Unit writting, but not in Fx
programming.
I'm usually using Matlab, and I would like to develop as AudioUnits
effects I've already developed in Matlab, and that use FFT/IFFT
block-by-block processing.
My aim is to provide my new sound transformations as open-source, as
soon as they are implemented.
Does anybody have tricks about how to do the basic do-nothing Fx (FFT
and the IFFT with no modification), for example using the esotheric
FFTW?
Any help, partial codes and so on would be really appreciated :)
Thanks in advance,
Vincent Verfaille
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