Processor controlled sound synthesizer

Details Processor controlled sound synthesizer Processor controlled sound synthesizer

1979-04-09

1981-06-09

Atkinson, Charles E.

G10L 100

Patent

active

042726492

ABSTRACT:
An electronic circuit is disclosed which is capable of producing synthesized sounds under the control of a microprocessor or other type computer. A plurality of switch inputs are provided whereby the sound to be produced can be selected. The processor, under program control, then generates such sounds utilizing one or more basic waveforms stored in a memory. These basic waveforms are modified in specified ways and then outputted through an I/O device to a digital to analog converter for application to an audio system. Eight input control lines to the microprocessor also feed an 8-input NAND gate, such that a momentary change of the normally-high control inputs will cause the NAND gate to activate an interrupt request.

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patent: 4125898 (1978-11-01), De Hart et al.
S. Smith, "Single-Chip Synthesizers", Computer Design, Nov. 1978, pp. 188, 190, 192.
Atari, Inc., "Middle Earth", Data Sheets.
V. Tandon, "Tired of Just Reading Results?", Electronic Design, Nov. 22, 1978, pp. 160-163.
Texas Instruments Inc., "SN76477, Application Notes".
D. Cannon, et al., "Designing With Microprocessors", Texas Instruments, 1975, pp. 110-113.

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