Large scale integrated circuit chip for an electronic organ

Details Large scale integrated circuit chip for an electronic organ Large scale integrated circuit chip for an electronic organ

1978-06-20

1980-05-20

Witkowski, S. J.

Music

Instruments

84 123, 84 126, G10H 106, G10H 506, G10H 510

Patent

active

042033373

ABSTRACT:
In a modular, expandable organ system comprising a plurality of large scale integrated circuit (LSI) chips an LSI chip is provided which produces frequencies corresponding to notes played on an organ keyboard. Outputs of different duty cycles of rectangular waves are provided for best simulating desired sounds. Other outputs are provided in which the notes are in octave groups facilitating filtering thereof. Each group of outputs has different attack and decay characteristics respectively under the control of the organist so that similar or different types of attack and decay may be provided on different outputs.
The present LSI chip provides three generators on one chip. The chips are capable of being interconnected such that any multiple of three generators may be provided.

REFERENCES:
patent: 3610799 (1971-10-01), Watson
patent: 4070943 (1978-01-01), Faulkner
patent: 4083286 (1978-04-01), Faulkner
patent: 4116102 (1978-09-01), Tsunoo et al.
patent: 4119006 (1978-10-01), Whitefield

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