Victor Company of Japan, Limited

Minoru Kakita

Tsuneo Kosugi

A keying system in an electrocin musical instrument comprises a circuit for generating harmonic level control voltages for controlling the levels respectively of harmonics (inclusive of the first harmonic, i.e., the fundamental tone), a circuit provided in correspondence to the keys of a keyboard of the musical instrument and responding to manipulations of said keys to generate envelope control voltages, an addition circuit for respectively adding the envelope control voltages corresponding to the keys and the said harmonic level control voltages, a mixing circuit for mixing outputs respectively corresponding to the same letter names among the outputs of said addition means, a sound-source circuit for generating sound-source signals of frequencies respectively of the harmonics (inclusive of the fundamental tone) corresponding to the keys, and a circuit for gating the sound-source signals of the frequencies of the letter names corresponding to said outputs among the signals from said sound source circuit through the use of the outputs of said mixing means.

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Hino, Japan

Minoru Kakita