Music – Instruments
Patent
1986-08-11
1988-02-16
Witkowski, S. J.
Music
Instruments
84445, 84478, G09B 1504, G10H 120
Patent
active
047247363
ABSTRACT:
A keyboard musical instrument with a transpositional function includes a keyboard, a mode selection switch, a microcomputer, a musical tone signal generator and a sound system. The keyboard has a plurality of keys respectively representing different notes in a musical scale. The mode selection switch selects one of a transposition mode and a play mode. The microcomputer includes a CPU, a ROM, and a RAM to detect first and second depressed keys when the transposition mode is selected by the mode selection switch. The microcomputer generates transposition data having a value corresponding to an interval between the notes represented by the first and second keys. The microcomputer generates a note signal representing a note higher or lower by the interval represented by the transposition data than a note of a given depressed key when the play mode is selected by the mode selection switch. The musical tone signal generator generates a musical tone signal in response to the note signal and the sound system sounds a musical tone corresponding to the musical tone signal, so that the musical tone is a transposed one of a tone represented by the given depressed key by the interval.
REFERENCES:
patent: 2933004 (1960-04-01), Hanert et al.
patent: 4176573 (1979-12-01), Deutsch
Nippon Gakki Seizo Kabushiki Kaisha
Witkowski S. J.
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