Re: Finding the main frequency of an input audio signal

On Aug 29, 2:51 pm, wi...@xxxxxxxxx wrote:
What is the best/easiest method to determine the main frequency of the
input audio signal? I am confused by some options (FFT, wavelets) and
I am just looking for a simple one which doesn't have to be too much
theory, but simply works. I still would like to learn something, not
just reuse somebody's solution in part or in whole and not understand
anything, but I wouldn't like to spend more then a day or two learning
the maths and so. Do you have any suggestions regarding this? Even a
simple list of possibilities would be good, but if you have the actual
experiences or links to some good tutorials, that would be great.

Well, first you need to define what you mean by the
"main" frequency, since the musical pitch frequency
that a human would recognize may not be the same thing
as any spectral envelope peak.

I have a list on a web page of a bunch of techniques
for frequency estimation which may or may not be useful
depending on your criteria.

http://www.nicholson.com/rhn/dsp.html

Some methods are easy, some are better at various
criteria. And you rarely get both unless you have
a highly constrained signal.


IMHO. YMMV.
--
rhn A.T nicholson d.0.t C-o-M

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