An electronic musical system comprised of an electronic musical apparatus and a musical control apparatus for remotely controlling the electronic musical apparatus, the electronic musical apparatus and the musical control apparatus being provided separately and connected with each other via communication interfaces (110, 209) thereof, wherein the musical control apparatus comprises: an operating element adapted to instruct to display a tone generator control screen; other operating elements (102a1 to 102a4) adapted to set tone generator parameters for use in the control of tone generators of different tone generator types of the electronic musical apparatus, the other operating elements (102a1 to 102a4) being associated with types of the tone generator parameters to be controlled; and a transmission unit adapted, in response to a user's manipulation on said operating element, to transmit to the electronic musical apparatus a command for instructing to display the tone generator control screen, and wherein the electronic musical apparatus comprises: a sequencer having a plurality of tracks; said tone generators of different tone generator types; a designation unit adapted to designate any one of the plurality of tracks; a setting unit adapted to set tone generator types each selected from the different tone generator types to respective ones of the tracks; a receiver unit adapted to receive the command transmitted from the musical control apparatus; and a display unit adapted, in accordance with the command received by said receiver unit, to display the tone generator control screen for the tone generator type set by said setting unit to the track designated by said designation unit, the tone generator control screen having still other operating elements for setting tone generator parameters displayed therein. an operating element adapted to instruct to display a tone generator control screen; other operating elements (102a1 to 102a4) adapted to set tone generator parameters for use in the control of tone generators of different tone generator types of the electronic musical apparatus, the other operating elements (102a1 to 102a4) being associated with types of the tone generator parameters to be controlled; and a transmission unit adapted, in response to a user's manipulation on said operating element, to transmit to the electronic musical apparatus a command for instructing to display the tone generator control screen, and wherein the electronic musical apparatus comprises: a sequencer having a plurality of tracks; said tone generators of different tone generator types; a designation unit adapted to designate any one of the plurality of tracks; a setting unit adapted to set tone generator types each selected from the different tone generator types to respective ones of the tracks; a receiver unit adapted to receive the command transmitted from the musical control apparatus; and a display unit adapted, in accordance with the command received by said receiver unit, to display the tone generator control screen for the tone generator type set by said setting unit to the track designated by said designation unit, the tone generator control screen having still other operating elements for setting tone generator parameters displayed therein. a sequencer having a plurality of tracks; said tone generators of different tone generator types; a designation unit adapted to designate any one of the plurality of tracks; a setting unit adapted to set tone generator types each selected from the different tone generator types to respective ones of the tracks; a receiver unit adapted to receive the command transmitted from the musical control apparatus; and a display unit adapted, in accordance with the command received by said receiver unit, to display the tone generator control screen for the tone generator type set by said setting unit to the track designated by said designation unit, the tone generator control screen having still other operating elements for setting tone generator parameters displayed therein.