This invention relates to an electronic musical instrument of the type wherein such various characteristics of the musical tones generated as the color, volume and effect are controlled by the manipulation of a plurality of volume adjusting members, switches or the like mounted on the surface of a control panel, and more particularly an electronic musical instrument which can be readily played or performed by a novice player by making inoperative some one of a plurality of operating members, if desired, or by enabling a control based on preset information.
In a prior art electronic musical instruments, for example an organ, only tone levers (tone volumes) were provided to control tone color and footage for each keyboard but in a modern electronic musical instrument, as a result of developments in digital techniques such performances as automatic rhythm, automatic bass/chord, automatic arpeggio, etc. are added and switches, volume adjusting members or the like are also mounted on the surface of the control panel in addition to the tone levers. For this reason, the number of the operating members mounted on the panel surface has been increased to 100 or more so that such a high grade electronic musical instrument is difficult to play for an unskilled player.