Re: fft and wavelets

[Sergei Steshenko]

--- 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


-----Inline Attachment Follows-----

_______________________________________________
Help-octave mailing list
address@hidden
https://mailman.cae.wisc.edu/listinfo/help-octave


http://www.gnu.org/software/octave/doc/interpreter/Signal-Processing.html#doc-fft
 -> stft (short time Fourier transform).


Regards,
  Sergei.