Casio Computer Co., Ltd.

Kosuke Shiba

Jun Hosoda

Kazuo Ogura

Ryuji Usami

Koichiro Daigo

Takashi Akutsu

Hajime Manabe

Yoshito Yamaguchi

Teruo Jinbo

Yoshiki Negoro

In a musical tone waveform generation apparatus for outputting musical tone signals generated by a software program at predetermined time intervals, sound source methods can be selected in units of tone generation channels. In the musical tone waveform generation apparatus, the sound source method or the tone color of a musical tone signal to be output is determined in accordance with performance data (pitch data, touch data, music part data, and the like). A musical tone signal is generated by CPU upon execution of a sound source processing program, associated with a modulation method stored in a memory. The generated musical tone signal is output at predetermined time intervals. As for sound source processing based on the modulation method, at least one operator processing, and algorithm processing for determining an input/output relationship among the operator processing operations are independently executed.

Data processing apparatus outputting waveform data for sound signals

A main CPU and a sub CPU take share of executing a tone generating process to generate multiple tone signals on a real-time basis without using an exclusive tone generator. The main CPU and sub CPU are formed on a one-chip LSI, thus facilitating realization of a compact electronic musical instrument. According to another structure, the main CPU executes tone generation while the sub CPU performs an effect process, thereby permitting a one-chip LSI to generate an effect-added musical tone.

Multi-channel tone generation apparatus with multiple CPU's executing

Apparatus for executing respective portions of a process by main and sub

Data processing apparatus outputting waveform data in a certain interval

Digital information processing apparatus with multiple CPUs

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Fussa, Japan

Kosuke Shiba