Electronic tone generating system
US4409877A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1981 |
| Grant date | Oct 18, 1983 |
| Priority date | — |
| Expiry date | Jul 14, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H1/24
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A tone generating system for an organ comprises a first group of tone generators for producing notes of a first chromatic scale and second group of tone generators for producing notes of a second chromatic scale, slightly offset from the first. The tone generators are addressed via a microprocessor in response to keyboard input, wherein the fundamental and a first plurality of selected harmonic components of a given note are generated by respective tone generators of said first group, and the remaining harmonics are provided by generators of the second group. Harmonic amplitude coefficients for particular organ waveforms are stored in random access memory and are subject to change according to stop inputs coupled to the microprocessor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.