Music – Instruments
Patent
1978-10-13
1979-12-04
Witkowski, Stanley J.
Music
Instruments
84445, G10B 320, G10C 328, G10H 100
Patent
active
041765737
ABSTRACT:
A transposing and intramanual coupling control circuit for an electronic keyboard instrument in which the status of the keys are scanned in groups by a group counter, each group corresponding to the twelve notes of an octave. The keys in each group provide status signals on a corresponding number of time-shared output lines as each group is scanned. If any key in a particular group has changed status, the scanning of the groups is interrupted and the individual keys in the particular group are scanned by a note counter to determine which keys have changed status. If a key has been depressed, the note number and octave number in the respective counters are stored in an assignment memory for assignment to a tone generator. Transposition is provided by shifting the phasing between the key scanning by the note counter relative to the output lines by a predetermined set amount at the start of each group scanning step. Depending on the set amount, which can be changed at the group scanning rate, a transposed note number is stored along with the octave number in the assignment memory in response to depression of a given key in a group. If the transposed note number associated with a particular key is in the next octave, the octave number from the group counter is adjusted by one as stored in the assignment memory.
REFERENCES:
patent: 3610800 (1971-10-01), Deutsch
patent: 3697661 (1972-10-01), Deutsch
patent: 3800060 (1974-03-01), Hallman, Jr.
patent: 3836909 (1974-09-01), Cockerell
patent: 3890871 (1975-06-01), Oberheim
patent: 3910149 (1975-10-01), Obayashi
patent: 3933072 (1976-01-01), Van der Wal et al.
patent: 3971282 (1976-07-01), Obayashi et al.
patent: 4048893 (1977-09-01), Coles
patent: 4056032 (1977-11-01), Coles
patent: 4058042 (1977-11-01), Wade et al.
Kawai Musical Instrument Mfg. Co. Ltd.
Witkowski Stanley J.
LandOfFree
Intrakeyboard coupling and transposition control for a keyboard does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Intrakeyboard coupling and transposition control for a keyboard , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intrakeyboard coupling and transposition control for a keyboard will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-85903