Electronic musical instrument

An electronic musical instrument comprises a plurality of tone signal synthesizing circuits connected to a keyboard section in parallel with each other and means for combining the outputs of said tone signal synthesizing circuits. The tone signal synthesizing circuit comprises a series connection of a voltage-controlled oscillator, a voltage-controlled filter, and a voltage-controlled amplifier; a first, a second and a third waveform generator for supplying controlling voltage waveforms to the oscillator, the filter and the amplifier, respectively, for controlling the tone pitch, the tone coloring and the envelope of the tone signal; and a waveform controlling circuit for supplying information variables for determining the shapes of the controlling waveforms to the waveform generators. The outputs of the tone signal synthesizing circuits are combined to supply an output tone signal provided with coupler effect. Upon depression of any single key, said plurality of tone signal synthesizing circuits are rendered operative to produce a music sound which is a mixture of a plurality of different tones.