Music – Accessories – Teaching devices
Patent
1977-05-31
1981-08-04
Hix, L. T.
Music
Accessories
Teaching devices
434227, G09B 1502, G09B 1508
Patent
active
042815797
ABSTRACT:
A teaching aid for piano and other keyed musical instruments. The device has switches electrically connected to a matrix array and mechanically linked to each key for detecting each key depression, an LED associated with each key for signalling the keys which should be played and an alphanumeric display for showing notes in literal and octave notation and for showing the student's position in a composition or exercise. The displays are connected in a matrix array and along with the key sensing switches are connected through interface circuitry to a microcomputer. The microcomputer stores a sequence of musical steps forming a composition and compares played notes to the stored sequence. When the compared notes and the depressed keys are identical, the student is signalled and the microcomputer advances to the next musical step. When there is an error, the microcomputer recycles the same musical step. An external, auxiliary memory, such as a cassette tape, may be used for storage of data representing a variety of musical compositions. Suitable programming permits the apparatus to be used for preparing and storing lessons, such as by the manual input at the instruments keyboard of additional musical compositions. Unique interface circuitry provides improved LED display, minimizes circuit components and permits the key sensing switches and the displays for an 88-key instrument to be linked to a modern microprocessor through only 13 input/output terminals, including only 8 terminals for data transfer and 5 for addressing and control.
REFERENCES:
patent: 4012852 (1977-03-01), Journot
patent: 4012979 (1977-03-01), Wemekamp
patent: 4054868 (1977-10-01), Rose
Foster Frank H.
Hix L. T,.
Schreyer S. D.
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