Abstract
Authors propose an automatic arrangement method for ensemble playing targeting popular music. Proposed method categorized each of tracks in MIDI music as either of melody, bass, backing or percussion. Plenty of MIDI files are analyzed to extract the one-bar-length backing phrases out of melody, bass and percussion phrases. In turn, principle components for the collected backing patterns are named as “Eigenphrase of backing”, that is used to label phrases in MIDI file for the purpose of automatic arrangement. The eigenphrase of backing is obtained to take part in the categorization of phrases in MIDI file to be arranged as either of melody, bass or backing. An automatic arrangement method based on extraction of phrases to be played by fewer players is therefore realized. Experimental results for the naturalness of music showed that the proposed method gives higher score than random-selected method. Also, the naturalness of sheet music given by proposed method was confirmed to be comparative with those by human.
