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RE: FFT - Spectrum Analyzer


From: Damian Harty
Subject: RE: FFT - Spectrum Analyzer
Date: Mon, 11 Jun 2012 14:13:46 +0000

> > Why would one perform a Fourier-based analysis on something so clearly 
> > non-stationary as music? I think wavelets are the tool of choice.
> > 

> There is short time FFT. FFT with buffer 0.1 second buffer length is
> often quite usable and still has 10Hz frequency resolution (more or less).

...but Fourier is predicated on the whole signal having the characteristics of 
the observed portion. One can perform short duration transforms, I agree - but 
this is typically done for ensemble averaging purposes, such as Welch's method.

Let me ask it another way: what question is answered by performing any kind of 
Fourier analysis on music? Or perhaps yet another way: Could you compare 
Shakespeare and Proust using Fourier-based methods on the spoken word?

Anyway, I suspect this is not what the Octave list is for, so I shall desist 
after this!

Regards,

Damian Harty 
Senior Research Fellow
Coventry University
+44(0)24 7688 8924
+44(0)7799 414832






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