A sound generation control apparatus comprising: a display control unit that defines on a display device a loop region having an outer periphery surrounding a reference point and indicating progression of time in association with a length in a circumferential direction of the loop region, and that displays in the loop region a music data image corresponding to music data which specifies content of music sound to be generated as time progresses, wherein the music data image is displayed in the loop region such that progression of the music data corresponds to the length in the circumferential direction of the loop region; a time output unit that outputs, upon receiving an instruction to start generation of the music sound, time information indicating a time that progresses from a timing corresponding to the instruction; and a sound generation control unit that controls the content of the music sound to be generated by a sound generation device based on the music data corresponding to the music data image and according to a relationship between a position in the circumferential direction of the loop region determined by the time information outputted by the time output unit and a location of the music data image in the loop region, wherein the display control unit performs control operation for displaying a plurality of music data images in the loop region on the display device, and the sound generation control unit performs control operation for simultaneously generating a plurality of music sounds corresponding to the plurality of the music data images as the time progresses, characterised in that the display control unit performs control operation for moving each of the plurality of the music data images in the circumferential direction of the loop region according to an instruction so as to change relative locations among the plurality of the music data images in the loop region. a display control unit that defines on a display device a loop region having an outer periphery surrounding a reference point and indicating progression of time in association with a length in a circumferential direction of the loop region, and that displays in the loop region a music data image corresponding to music data which specifies content of music sound to be generated as time progresses, wherein the music data image is displayed in the loop region such that progression of the music data corresponds to the length in the circumferential direction of the loop region; a time output unit that outputs, upon receiving an instruction to start generation of the music sound, time information indicating a time that progresses from a timing corresponding to the instruction; and a sound generation control unit that controls the content of the music sound to be generated by a sound generation device based on the music data corresponding to the music data image and according to a relationship between a position in the circumferential direction of the loop region determined by the time information outputted by the time output unit and a location of the music data image in the loop region, wherein the display control unit performs control operation for displaying a plurality of music data images in the loop region on the display device, and the sound generation control unit performs control operation for simultaneously generating a plurality of music sounds corresponding to the plurality of the music data images as the time progresses, characterised in that the display control unit performs control operation for moving each of the plurality of the music data images in the circumferential direction of the loop region according to an instruction so as to change relative locations among the plurality of the music data images in the loop region.