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, 20 Jun 2007 15:18:55 +0200
You'll also need to read up on windowed fourier transforms and I would
consider using the Accellerate framework to do the heavy DSP lifting
if you're considering making this software mac-only.
I guess Mark was reffering to the vDSP library provided by Apple.
Especially the FFT sample code is worth a look:
http://developer.apple.com/documentation/Performance/Conceptual/vDSP/sample_chap/chapter_5_section_3.html
I successfully implemented some of the routines into an AU. Still, I did
not provide any user interface.
But I guess that wouldn't be a too complicated thing to do, if you're
already into it.
General documentation and/or tutorials about perfoming FFTs and how to
interpret the resulting data can be found here (among a lot of others of
course):
http://www.dspdimension.com/
http://www.dspguru.com/
http://www.dspguide.com/
A question to the list about the vDSP routines: How do these
perform/behave with Intel Macs? I learned they don't use the AltiVec
Processor anymore.
Does that result in any disadvantages, I mean in terms of processing
power? Thanks for any clues.
.beni
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