Method and apparatus for generating a tone based on tone generating software
US5973251A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1996 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Dec 20, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2230/041
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
In a case where tone waveform sample data are to be arithmetically formed by software, there are installed, within a virtual device driver routine of an operating system, a MIDI processing routine for converting a received MIDI event into tone generator control data and a waveform forming processing routine for arithmetically forming tone waveform sample data for one frame. The MIDI processing routine is triggered by a software interrupt signal that is generated in response to a MIDI event produced from an application software program such as a sequencer software program, and the waveform forming processing routine is triggered by a hardware interrupt signal that is generated upon completion of tone reproduction for one frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.