Music – Instruments
Patent
1976-12-10
1978-07-04
Witkowski, Stanley J.
Music
Instruments
84DIG2, 84DIG8, 84DIG20, 84DIG23, G10H 100, G10H 500
Patent
active
040981622
ABSTRACT:
An electronic musical instrument includes a pitch determining voltage signal generating circuit adapted to produce one of 12 pitch determining voltage signals having different magnitudes corresponding to 12 notes in one octave in response to any of keys belonging to different octave ranges in a keyboard and having the same note name. A pitch determining voltage signal common to the different octave ranges is converted by a voltage converting circuit and taken out as a voltage signal having a magnitude corresponding to the note of a key being depressed on the keyboard. The voltage converting circuit includes a voltage dividing network having a plurality of output points and gate circuits connected to the output points, respectively. Each gate circuit is enabled in response to the depression of a key belonging to a corresponding octave range. Alternatively, the voltage converting circuit is constructed of a variable gain amplifier whose voltage gain is controlled dependent upon the octave range to which a key being depressed belongs.
REFERENCES:
patent: 3880039 (1975-04-01), Studer
patent: 3898905 (1975-08-01), Schreier
patent: 3906830 (1975-09-01), Mathias
patent: 4016792 (1977-04-01), Schrecongost
Ichikawa Kiyoshi
Okamoto Eisaku
Nippon Gakki Seizo Kabushiki Kaisha
Witkowski Stanley J.
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