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 .