Tone signal generator having a sound effect function and efficie

Details Tone signal generator having a sound effect function and efficie Tone signal generator having a sound effect function and efficie

1995-03-31

1998-04-21

Shoop, Jr., William M.

Music

Instruments

Electrical musical tone generation

84629, 84633, G10H 102, G10H 700

Patent

active

057419914

ABSTRACT:
A tone signal generator including a memory for storing tone signal data, a parameter generation device for generating parameter data, and a tone signal data generation device for generating the tone signal data by reading it from the memory, according to the parameter data. The generator includes also a level monitor device for monitoring a level of the tone signal data, and access control device to the memory. The access control device inhibits an access of the tone signal generation device to the memory when the level monitor device detects that the level of the tone signal data monitored is less than a specified value.
Because the access control device inhibits the access of the tone signal generation device when the level of the tone signal data reaches the specified value, any other devices, such as a cpu, can access to the memory device in place of the tone signal generation device.
Another embodiment of the present invention further comprises a phase change control device for changing a generating phase of envelope data from an attack phase to a following phase, when a read address in the attack phase of the tone signal data reaches an end address. This configuration allows the phase timing of the envelope data and the tone signal data to be severely matched.

REFERENCES:
patent: 5123323 (1992-06-01), Fujita et al.
patent: 5218154 (1993-06-01), Kondo
patent: 5270478 (1993-12-01), Tetsuji et al.
patent: 5292997 (1994-03-01), Kato et al.
patent: 5463183 (1995-10-01), Konno

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