Solenoid-hammer control system for the re-creation of expression effects from a recorded musical presentation
US4132141A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1976 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Apr 28, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S84/29
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
There is disclosed an expression system for playback of a magnetic tape record rendition of a musical presentation. The detected intensity level for the bass and treble halves of the keyboard are assigned different data bit positions in the frames of recorded data bits of a time division multiplexed record system. The binary bits are weighted and used to modulate the width of pulses supplied to selected solenoids which actuate the striker-hammer members of the instrument so that the average drive energy applied to the solenoid is proportional to the desired intensity thereby more faithfully reproducing the manual action of the original performer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.