Music – Instruments – Electrical musical tone generation
Patent
1989-06-20
1992-11-17
Shoop, Jr., William M.
Music
Instruments
Electrical musical tone generation
84636, 84652, 84668, G01H 100, G01H 102
Patent
active
051645297
ABSTRACT:
An interruption control apparatus for controlling interruptions of a performance information processor for processing performance information of a piece of music. The interruption control apparatus includes a first time control unit for regulating the length of a time interval between successive interruptions of the performance information processor according to a pre-set tempo in such a manner that the regulated time interval is limited within a predetermined constant range, and for outputting an interruption signal at the regulated time interval; a second time control unit for receiving the interruption signal and increasing a parameter of a register by an increment, of which the value varies inversely as the pre-set tempo, every reception of the interruption signal and further transferring performance information to the performance information processor each time the parameter reaches a predetermined value and then resetting the parameter to become zero; and an interruption processing unit for receiving the interruption signal and interrupting the performance information processor in response to the received interruption signal.
REFERENCES:
patent: 4323978 (1982-04-01), Hoefert
patent: 4700604 (1987-10-01), Morikawa
patent: 4733593 (1988-03-01), Rothbart
patent: 4876937 (1989-10-01), Suzuki
patent: 4924745 (1990-05-01), Kimpara et al.
patent: 4957552 (1990-09-01), Iwase
Kawai Musical Instrument Mfg. Co. Ltd.
Shoop Jr. William M.
Sircus Brian
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