Method and apparatus for generating a tone based on tone generat

Details Method and apparatus for generating a tone based on tone generat Method and apparatus for generating a tone based on tone generat

1996-12-20

1999-10-26

Donels, Jeffrey W.

Music

Instruments

Electrical musical tone generation

G10H 700

Patent

active

059732512

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.

REFERENCES:
patent: 4899632 (1990-02-01), Okamura
patent: 5020410 (1991-06-01), Sasaki
patent: 5121667 (1992-06-01), Emery et al.
patent: 5345035 (1994-09-01), Yamada
patent: 5448009 (1995-09-01), Kudo
patent: 5717154 (1998-02-01), Gulick
patent: 5763801 (1998-06-01), Gulick

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