An electronic musical instrument having a pitch designating unit capable of designating pitches of a plurality of tone signals to be generated, a plurality of tone signal generating channels for selectively generating and outputting a plurality of tone signals having a different pitch designated by the pitch designating unit, a mixing unit for mixing tone signals generated by the plurality of tone signal generating units, a plurality of resonance signal generating units each having a different resonance frequency characteristic, for receiving a mixed tone signal from the mixing unit and generating and outputting a plurality of different resonance signals, and an input level controller provided on the input side of the plurality of resonance signal generating units, for controlling a level of the mixed tone signal from the mixing unit for each resonance signal generating unit, in accordance with a pitch of each of a plurality of tone signals to be generated, and supplying the level controlled mixed tone signal to each resonance signal generating unit. The electronic musical instrument also has a sostenuto pedal detector, and when the sostenuto pedal is depressed, the input level controller may further adjust the level of the level controlled mixed tone signal corresponding to a pitch or pitches of generated tone signals.