| 摘要 |
PURPOSE: To specify wide chords by judging the chord in an inversion form obtained based on a musical sound pattern to be played, adding weight to the judged chord and turning the chord of the maximum weight to the chord based on the musical sound pattern. CONSTITUTION: This automatic accompaniment device 2, including the chord detector, is connected to a keyboard 1 by an interface based on the digital interface standard of an electronic musical instrument, and the key pressing information of the keyboard 1 is inputted. Musical instrument sound, as electric signals from the automatic accompaniment device 2, is sounded by a sound system 3. In this case, the chord detector judges the chord corresponding to the inversion form obtained by an inversion form computing means, adds the weight to the judged chord and obtains the chord of the maximum weight as the chord corresponding to a specified musical sound pattern.
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