Electronic musical instrument
US4227435A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1978 |
| Grant date | Oct 14, 1980 |
| Priority date | — |
| Expiry date | Apr 20, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H1/02
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A musical tone varying in tone color with the lapse of time is produced in an electronic musical instrument by retrieving a plurality of different waveshapes from a plurality of memories and then by mixing these retrieved waveshapes at a variable ratio according to a plurality of time-dependent parameters. In order to ensure a simpler arrangement of the instrument while maintaining richness in tone color variation characteristics of the produced musical tone, the mixing is adapted to be performed by carrying out multiplications individually on the respective retrieved waveshapes with the associated time-dependent parameters and then by adding up the resultant values to obtain the aimed musical tone. Some of the time-dependent parameters may be derived from other time-dependent parameter in the mixing procedure of several different waveshapes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.