Musical instrument
US4365533A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1976 |
| Grant date | Dec 28, 1982 |
| Priority date | — |
| Expiry date | Jun 11, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2250/475
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A new, performer played, real time, multitonal, multitimbral musical instrument consists of speed and force sensitive keys in which time domain multiplexing is used to find and associate one and only one tone generator, not otherwise busy, with any key that is depressed. The sound generator disclosed can provide very realistic simulations of the flute, oboe, trumpet, French horn, trombone through the provision of various types of modulations in amplitude and frequency of the various partials, as is characteristic of each instrument simulated, and filtered noise. Glissandi are provided from one note to another and are controlled from the pair of keys involved by the relative pressure with which they are depressed. For the nonpercussive tonalities, the speed with which a key is depressed, which is determined by differentiating the force, may be used to cause the attack transient to behave in a manner very characteristic of the instrument being simulated. The force with which a key is depressed is determined from the rate of rise of the potential across a capacitive keying system excited through a resistor. Percussive sound generators are provided also; the intensity of the note gener…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.