[linux-audio-user] Noise reduction with FFT

Spencer Russell Spencer.Russell at oberlin.edu
Thu Jan 6 02:42:36 EST 2005


I've got this really noisy audio file I'm trying to clean up, and
I was thinking, it would be really cool if I could run a clip of
the file that was just the noise(it's a recording of a discussion
for a TV broadcast, so when no one's talking, it should be
silent) and have the program output an average frequency content,
in some sort of format that another program could take it as
input and create a filter that would filter out those
frequencies. It seems like brutefir would be able to do the
latter part, but is there a way to automatically generate the
filter definition from the frequency content of a file? Is this a
feasable method of noise reduction? If it seems like it could
work, but there isn't a program to do it, I would be interested
in writing it, if anyone has any input.

Thanks!
-spencer



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