Initially there is the problem of pitch recognition, which is reasonably easy to do for simple monophonic instruments (eg voice) using a method such as autocorrelation or harmonic sum spectrum (eg see Paul R's link). I hope you do have the interest as it is a really fascinating area. If you're expecting to throw a couple of FFTs at the problem then you won't get very far. ![]() ![]() It's worth being aware that this is a very tricky problem and if you don't have a background in signal processing (or an interest in learning about it) then you have a very frustrating time ahead of you.
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