Method and apparatus for emulating a frequency modulation device

Details Method and apparatus for emulating a frequency modulation device Method and apparatus for emulating a frequency modulation device

1997-07-15

2000-04-18

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84635, 84DIG12, 84DIG27, G10H 114, G10H 140

Patent

active

060517727

ABSTRACT:
A system and method are disclosed for emulating a frequency modulation sound chip with minimal hardware and utilizing the excess capacity of current computer systems. In one embodiment, the frequency modulation emulation apparatus includes a frequency modulation emulator suitable to communicate with a computer system. The frequency modulation emulator provides an addressable memory space, substantially similar to an emulated addressable memory space of the emulated frequency modulation sound chip, such that a frequency modulation application implemented on the computer system can communicate with the frequency modulation emulator. The emulator chip receives audio data through the addressable memory space from the frequency modulation application and, the frequency modulation application is unaware that the frequency modulation emulator is receiving the audio data rather than the emulated frequency modulation sound chip. A frequency modulation generator is implemented on the computer system. The frequency modulation generator receives the audio data from the frequency modulation generator. The frequency modulation generator processes the audio data to produce an audio signal in a manner that is substantially similar to the operation of the emulated frequency modulation sound chip. Thus, minimal hardware is used to emulate a frequency modulation sound chip, and utilizing the excess capacity of current computer systems.

REFERENCES:
patent: 5164530 (1992-11-01), Iwase
patent: 5808221 (1998-09-01), Ashour et al.
Yamaha Corporation, YMF262 Application Manual, Catalog No.: LSI-6MF2622, 1988.

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