Re: Anyone know of any pitch recognition DSP libraries ?
Re: Anyone know of any pitch recognition DSP libraries ?
- Subject: Re: Anyone know of any pitch recognition DSP libraries ?
- From: Martin Gasser <email@hidden>
- Date: Mon, 26 Nov 2007 10:19:02 +0100
1) As a starting point, calculate the magnitude spectrum (via FFT) of
the buffer contents. Picking the most prominent peak in the spectrum
should give you the note frequency. Have a look at http://
ccrma.stanford.edu/~pdelac/research/MyPublishedPapers/icmc_2001-
pitch_best.pdf for an introduction to more robust (time- and
frequency-domain) pitch detection techniques.
It should be quite easy to find implementations in Matlab or C/C++ on
the web (ask Google....).
2) For a given frequency value f in Hz, the closest corresponding
MIDI note can be calculated via:
m = round( log2((f / 8.1757989156)^12 ) )
HTH,
Martin
On Nov 22, 2007, at 2:39 AM, Daniel Stenning wrote:
Basically all I need is to be able to pass in a buffer holding a
slice of
audio representing a single monophonic note ( mono or stereo )
and get
back an integer representing the MIDI note corresponding to the slice.
Know of anyone who makes and can license such stuff ?.
Regards
Dan
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