The electronic musical instrument comprises a plurality of slide-type faders (1), an interval setup device (5, 6), and a sound synthesis device (20). The slide-type faders are provided correspondingly to a plurality of tones included an interval and allow slide operations to change output sound volume. The interval setup device means sets the interval to define a tone for each slide-type fader. The sound synthesis device synthesizes sounds according to a volume changing pattern with predefined sound quality and based on operations of the slide-type fader. The slide-type faders can be manipulated by fingertips or the like for musical performance to enjoy the DJ play without many practices or high proficiency.