JPS59158197U - electronic musical instruments - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

The drawings show an embodiment of the electronic musical instrument according to the present invention, and FIG. 1 is a diagram of a triangular wave waveform, FIG. 2 is a graph showing the principle of triangular wave synthesis, and FIG. 3 is a graph showing the waveform of a pulse signal in the circuit. FIG. 4 is a block diagram. 1: Memory circuit for storing triangular wave functions, 2: Inverter as an inversion circuit, 3: Multiplexer, 4
: multiplier circuit, 5: power output, 6: adder, 7: synthesis circuit, 8: multiplier, 9: harmonic memory, 10: keyboard, 1
1: Controller.

Claims (1)

[Scope of utility model registration request] A memory circuit for storing a triangular wave function, an inverting circuit capable of taking the complement of a signal from the memory circuit and outputting a triangular wave function of opposite phase, a counter, and an adder are sequentially connected. a multiplier circuit configured to output a signal obtained by multiplying the input frequency from the counter by N times, and to synthesize triangular wave functions from the first order to the Nth order; A synthesis circuit is provided for multiplying the synthesized triangular wave function by a harmonic coefficient to synthesize a musical sound waveform, and the clock of the counter is set to a frequency division clock having a frequency division ratio corresponding to the key position of the keyboard. An electronic musical instrument characterized by: