[LAD] A high performance frequency analyzer

Hi,

I've been toying recently with the X window test extension (which
allows the user to simulate input events) and I've decided to create a
bigger project that uses it. My project idea would be a unix daemon
that reads data from the sound card, gets the dominant frequency and
then reports a key corresponding to this data.
Unfortunately, I don't know the theory of spectrum analysis and I
don't think I could come up with a high-performance spectrum analyzer
in reasonable time.
So, my question is : do you know a good spectrum analyzer, preferably
written in C that I could modify ?

Regards,
Karim
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Received on Thu Feb 19 08:15:03 2009