Processor controlled sound synthesizer
US4272649A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1979 |
| Grant date | Jun 9, 1981 |
| Priority date | — |
| Expiry date | Apr 9, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.