i've seen NNLS/chroma referenced in a few places, like the chordify papers: http://isophonics.net/nnls-chroma http://isophonics.net/nnls-chroma Here's chordif

i've seen NNLS/chroma referenced in a few places, like the chordify papers: http://isophonics.net/nnls-chroma http://isophonics.net/nnls-chroma Here's chordify: http://ismir2012.ismir.net/event/papers/295_ISMIR_2012.pdf http://ismir2012.ismir.net/event/papers/295_ISMIR_2012.pdf That conference has great references but unfortunately hasn't been repeated since 2012 http://www.ismir.net/proceedings/index.php http://www.ismir.net/proceedings/index.php