Re: [SoX-users] Get amplitude of specific frequency

[Chinmay P. <not...@gm...>]

The way the math for frequency analysis (using FFT as mentioned by RT)
works, you usually get the amplitude of a range of frequencies (sometimes
called bins). But as long as you find a bin containing the frequency of
your interest and the bin is small enough, you can use the amplitude of
that bin.

If you do "*sox <filename> -n stat -freq*", you get the FFT data of your
file in 4096 bins.

The *−freq* option calculates the input’s power spectrum (4096 point DFT)
> instead of the statistics listed above. This should only be used with a
> single channel audio file.


This should get you amplitude (specifically power spectrum) of the various
bins.



On Fri, Jul 11, 2014 at 4:54 PM, Peter Kroon <pla...@gm...> wrote:

> Hi,
>
> How can I get the amplitude of a specific frequency?
> Any suggestions?
>
> Thanks,
> -- Peter
>
>
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