Guitar Chord Recognition Algorithm?

Question

Whats a good digital signal processing algorithm that is good on guitar chords? Since Fast Fourier Transform I think only is accurate on single notes played on the guitar bu

Answer 1

Well, you can try another set of algorithms for frequency-domain, like wavelets. But I am not sure if that will do for your accuracy issue. Actually, I didn’t understand in what way you are having trouble with the FFT. It will always be an approximation of the chord, there is no perfect way to retrieve that kind of information on sound.

So, it depends on the analysis you do on that spectrum, with single notes, there is actually a lot of better algorithms than the FFT, but with chords you will very likely have to work with FFT.

The problem you will have to deal is split the fundamental harmonics from the upper harmonics, one thing that may help is only consider frequencies that are on the guitar range. If you only have to work with guitar sounds, you should give some time to study the normal frequency-domain graph of the guitar and try to use that to improve you accuracy.