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Re: fft and wavelets
From: |
Sergei Steshenko |
Subject: |
Re: fft and wavelets |
Date: |
Thu, 23 Aug 2012 02:32:00 -0700 (PDT) |
--- On Wed, 8/22/12, Rick T <address@hidden> wrote:
From: Rick T <address@hidden>
Subject: fft and wavelets
To: address@hidden
Date: Wednesday, August 22, 2012, 7:21 PM
Greetings All
I can use fft to get the, frequencies, phases and magnitude of a loaded 1
second audio file of person saying "ahhhh" and recreate it.
What I'm trying to do now is find out where each of those frequencies begin and
where they stop in the 1 second audio file
Example:100hz starts at .23seconds to .34seconds,
104.34hz starts at .35seconds and ends at .37seconds.
Can fft's do this or do I need to shift my whole program to use wavelets? Also
are there any wavelet examples in octave that show how do this?
I'm using Ubuntu Linux 12.04 and Octave 3.2.4 from the repo's
Thanks
Rick
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http://www.gnu.org/software/octave/doc/interpreter/Signal-Processing.html#doc-fft
-> stft (short time Fourier transform).
Regards,
Sergei.