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POHOW to get MFCC from an FFT on a signal?
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  1. POHOW to get MFCC from an FFT on a signal?
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    copied!<p><strong>SHORT AND SIMPLE:</strong> Hi all very simply... I just want to know the steps that are involved to get an MFCC from an FFT.</p> <p><strong>DETAILED:</strong></p> <p>Hi all. I am working on a drum application where I want to classify sounds. Its just a matching application, it returns the name of the note that you play on the drum.</p> <p>Its a simple indian loud big drum. There are only a few notes on there that one can play.</p> <p>I've implemented the fft algorithm and successfully obtain a spectrum. I now want to take it one step further and return the mfcc from the fft.</p> <p>This is what i understand so far. its based on linear cosine transform of a log power spectrum on a nonlinear mel scale of frequency.</p> <p>it uses triangulation to filter out the frequencies and get a desired coefficient. <a href="http://instruct1.cit.cornell.edu/courses/ece576/FinalProjects/f2008/pae26_jsc59/pae26_jsc59/images/melfilt.png" rel="noreferrer">http://instruct1.cit.cornell.edu/courses/ece576/FinalProjects/f2008/pae26_jsc59/pae26_jsc59/images/melfilt.png</a></p> <p>so if you have around 1000 values returned from the fft algorithm - the spectrum of the sound, then desirably you'll get around 12 elements (i.e., coefficients). This 12-element vector is used to classify the instrument, including the drum played...</p> <p>this is exactly what i want.</p> <p>Could someone please help me on how to do something like this? my programming skills are alright. Im currently creating an application for the iphone. with openframeworks.</p> <p>Any help would be greatly appreciated. Cheers</p>
 

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