Chords Progressions Transformer Chords-conditioned music transformer for chords progressions generation Original Version Features demonstration Dual Models Version Features demonstration Other chords-related projects chords_recognizer magenta note-seq chords labeler free-midi-chords chords2midi chorder pychorelib pychord accomontage2 chord-melody-dataset autoharmonizer chords-suggester jchord chord-generation chord-composer hooktheory Project Los Angeles Tegridy Code 2024