Apparatus for chorus effect in electronic musical instruments
US4186643A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1978 |
| Grant date | Feb 5, 1980 |
| Priority date | — |
| Expiry date | Apr 26, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S84/04
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Apparatus for chorus effect in an electronic musical instrument in which a passing circuit for a musical tone signal is obtained from a musical tone signal generator by operation of a key. The passing circuit is connected to a plurality of variable delay circuits which are individually controlled by a plurality of delay control signals generated by a delay control signal generator. The passing circuit for the musical tone signal has a format filter, as well as a keying signal generating circuit. An output terminal of this keying signal generating circuit is connected to a voice production initial stage change control signal generator. The latter control signal generator has an output terminal connected to the musical tone signal generator or the delay control signal generator. The voice production initial stage change control signal generator, furthermore, has a network which generates a control signal which is largely disordered from its steady state and is then damped to restore to the steady state, upon application of a keying signal generated from the keying signal generating circuit. The voice production initial stage change control signal generator, may include a low frequenc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.