Re: Multi Channel FFT Audio Anaylzer + Question
Re: Multi Channel FFT Audio Anaylzer + Question
- Subject: Re: Multi Channel FFT Audio Anaylzer + Question
- From: Benjamin Federer <email@hidden>
- Date: Wed, 27 Jun 2007 00:38:18 +0200
Hi Ian,
first of all I'd like to say thank you for all the information you
provided. I am sorry if this is getting off topic in the meantime.
Maybe someone could point me to a more appropriate mailing list that
discusses the Accelerate framework and/or especially the vDSP library.
One thing I am unsure of is about the vector alignment:
The most common reason to fall into scalar code is that
your data is not aligned properly. Check that first. Different parts of
Accelerate.framework require different levels of alignment.
The vDSP library shows some sample code that uses
the "vec_malloc" statement. Unfortunately I could not get Xcode
to like it. Instead I had to use "malloc". Frank Schoep's
homepage states the use of a "__attribute__ ((aligned))"
postfix for GCC. I could not manage to find any specific information
about vector alignment in the vDSP documentation. Any clues?
Thanks in advance
.beni
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