Nippon Gakki Seizo Kabushiki Kaisha

Hirokazu Katoh

Akinori Endo

Yasunori Mochida

An automatic performance system in an electronic musical instrument comprises circuits for forming digital performance information signals by converting the displacement of movable members operated according to the contents of a performance into digital signals, and circuits for forming musical tone information signals corresponding to the contents of the performance from harmonic rich tone signals by controlling predetermined signal paths with electronic switches operated in response to the performance information signals, the digital performance information signals being detected and stored, and read out into the electronic switches at proper time instants, whereby all of the performance information signals are automatically reproduced as musical tone information signals with fidelity. The digital performance information can be automatically modified as desired in the process of storage and reproduction thereof to obtain modified musical tone information, and can furthermore be stored as information in a compressed state which contains digital signals indicating the occurrence of events in the performance and relative time information between the events.

Electronic musical instrument

Tone lever switches deliver respective digital information signals each representing the manipulated state of each tone lever. A memory circuit memorizes plural sets of the information signals. A write/read control circuit determines whether the memory circuit memorizes the digital information signals from the tone lever switches or it delivers out the memorized digital information signals. A tone color control circuit controls the respective intensities of the tone signals of respective voices in accordance with the information signals read out from the memory circuit.

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Hamamatsu, Japan

Hirokazu Katoh