| 摘要 |
PURPOSE:To readily play chords through automatic playing by arithmetically processing the numerical value codes corresponding to the tone of music sheet and the main tones of chords and program-controlling acoustic signal synthesizing means. CONSTITUTION:The main tones of chords are selected with a keyboard and the tone of music sheet is selected with the flat, sharp keys and numerical keys, etc. of the keyboard or assignment keys. At the same time, when the chord pattern numbers are selected by operation keys, the numerical codes corresponding to these operations are applied to a microcomputer 300. Then, the chord pattern codes corresponding to the operation of the switches 100 are generated by the arithmetic processing through RAM 320, ROM 330, CPV 310, etc. and the musical tone signals corresponding to the octave change, rest, etc. are generated from sound source generating circuits 700 thru 820, mixing circuit 600, thus automatic playing of the chords is accomplished. |
