Hi,
Andre Michelle did some nice talks about simple audio stuff - his
sources may have some useful "helpers"
http://blog.andre-michelle.com/2008/fotb08-sildes-and-sources/
Also checkout his lab page: http://lab.andre-michelle.com/ There
is an EQ filter on there, which might be useful.
HTH
Glen
On 11/05/2011 21:12, Anthony Pace wrote:
Hello list,
I have been doing some experiments, but although my stuff is working,
it isn't optimized at all, and I would to try a reliable lib that uses
zero crossings for analysis, if one exists.
Any suggestions?
I am really just interested in pitch analysis with very small sample
chunks. Timber is not really necessary, so I, with my limited DSP
knowledge, think the FFT is overkill; however, I absolutely admit I
could be wrong and not seeing something important.
Another thing is that I was thinking a good/cheap way to get rid of
some low level background noise would be to normalize all values
within the time domain with a very high gain factor, and just give max
and min values for the zero crossings( e.g +3, -3 respectively... I
know the numbers would obviously not be these ones). I know know
frequency analysis would have to be preformed in order to remove a
voice, but I am thinking that this could allow me to zero out/ignore,
really low level/really high level background noise. Should I try
something different?
Again, I have just started reading through a copy of 'DSP: a computer
science perspective', that someone gave me, and it seems like what I
am talking about would work; yet, if not, and you have experience with
signals analysis, I would appreciate the heads up.
Thank you,
Anthony
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