Nippon Gakki Seizo Kabushiki Kaisha

Michio Kondo

Akira Nakada

Tsuyoshi Futamase

Masanobu Chibana

Akiyoshi Ohya

The system comprises a frequency number memory device for storing information regarding the frequencies of respective tones, a keyboard switch for reading out frequency number information corresponding thereto from the memory device, an address generator including an adder for adding a predetermined number of the frequency number information thereby producing an address signal consisting of plural bits, address composers for processing the bits of the address signal and thereby composing digital tone signals constituting a saw-tooth, square and triangular waveshape, and digital-analog converters for converting the digital tone signals into analog tone signals, which are thereafter used to synthesize waveshapes of any tone.

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Hamamatsu, Japan

Michio Kondo