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Re: Multi Channel FFT Audio Anaylzer + Question
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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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  • Follow-Ups:
    • Re: Multi Channel FFT Audio Anaylzer + Question
      • From: Philippe GRUCHET <email@hidden>
References: 
 >Multi Channel FFT Audio Anaylzer (From: IgnisFatuus <email@hidden>)
 >Re: Multi Channel FFT Audio Anaylzer (From: Mark Pauley <email@hidden>)

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