Previous event feedback system for electronic player piano systems
US7217880B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 2006 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Mar 20, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2230/011
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method of utilizing previous event feedback information from historical derived hammer velocity data, such as associated with a MIDI record function, for providing non-real-time feedback when controlling actuators. The use of non-real-time feedback within the present invention provides a number of advantages over the use of conventional real-time feedback mechanisms. Utilization of the non-real-time (historical) key actuation information reduces the amount of circuitry necessary for correcting the operation of the actuators (i.e. solenoids) during playback on the instrument. By way of example, a programmable circuit element receives velocity information on previous key strikes for adjusting the actuator velocity output signal which will be generated for future key strikes. The accuracy of key strike normalization provided by this method approaches that which is achievable using real-time feedback, because the velocity profiles for each key remain substantially constant during playback.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.