JPS5456414A - Automatic performance apparatus of electronic musical instruments - Google Patents

Abstract

PURPOSE: To enable musical tones on the way of the musics having been written in memory device to be changed as desired by subsequently reading out the musical tone information having been written in the memory device by address signals and forming musical tones.

CONSTITUTION: When a changeover switch 6 is set at the automatic side A side and a switch 65 and a switch 1 are turned on, the counter 71 of an address generator 7 is set, and the pulses by a differentiation circuit 61 are delayed by a minute time by a delay circuit 62 and are then inputted to the terminal C of the couter 71. The pulses from the circuit 61 are delayed by a minute time and enter the reset terminal R of the oscillator 50 of a time detection automatic address generator control unit 5 via switch 65. The counter 71 counts the above pulses and a decoder 72 outputs the first address signal in a random access memory 9 and reads out the musical tone information having been stored in the first address. The time information out of this is then inputted to the decoder 55 of the unit 5 and the other to a musical tone forming circuit. Thereby, the musical tones on the way of the music having been stored may be changed

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