Music – Instruments – Electrical musical tone generation
Patent
1989-02-03
1990-12-25
Witkowski, Stanley J.
Music
Instruments
Electrical musical tone generation
84DIG7, 338 69, 341 27, 341 34, G10H 1055
Patent
active
049794230
ABSTRACT:
A touch response device for an electronic musical instrument includes pressure detector for detecting initial-touch and after-touch of a key. The pressure detector means has two or more response stages that have different response characteristics to key pressure variation. An initial-touch-detector signal is produced when the pressure detecting means is in a first response stage among the response stages, and after-touch-detector signal is produced when the pressure detecting means is in a second response stage among the response stages. According to the invention, initial-touch signal and after-touch signal are generated by the use of one common operation-detector signal produced from the pressure detector means. As a result, the construction of the pressure detecting means is much simplified compared with a conventional touch-response device provided with two separate detectors, one of which detects initial-touch and another of which detects after-touch.
REFERENCES:
patent: 3784935 (1974-01-01), Pearlman et al.
patent: 4194425 (1980-03-01), Kitagawa
patent: 4528885 (1985-07-01), Chihana
patent: 4558623 (1985-12-01), Buchla
Witkowski Stanley J.
Yamaha Corporation
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