Individual chords and bar lines are extracted from an acquired chord chart described in text. Further, musical time information indicative of a musical time of music data to be generated is acquired, chord progression information is generated by allocating in-bar relative time positions to the extracted individual chords in accordance with the musical time indicated by the acquired musical time information and the extracted bar lines. A chord chart display can be provided based on the generated chord progression information. Further, accompaniment pattern data is acquired, and automatic accompaniment data can be generated by controlling the acquired accompaniment pattern data in accordance with the generated chord progression information.
Music data generation based on text-format chord chart