Expectation-based parsing for jazz chord sequences
Yuta Ogura, Hidefumi Ohmura, Yui Uehara, Satoshi Tojo, Kouichi Katsurada · Zenodo (CERN European Organization for Nuclear Research) · 2020
Many grammar theories of music have been proposed compared to language, and thus, the syntax has been revealed in a tree. In their parsing processes, trees are usually constructed by the generative rules given by the whole span of a music piece in a top-down manner. In this paper, we propose an incremental parser of music, from the left to the right of the scores, building partial trees. In this process, we can predict the succeeding phrase from the beginning part. Therefore, the generation process of the tree itself represents our human expectation process of music. We apply our method to jazz music represented by chord sequences, implement the parser, and exemplify the incremental generating process in several standard pieces.