| 摘要 |
PURPOSE:To clarify a music selecting state and to easily check the state by forming two lines of displays indicating music numbers and expressing a selected state by turning on one of the two lines of displays and turning off the other line. CONSTITUTION:A key entry such as a music selection is inputted from a keying part 5 to a control part 4 and the control part 4 stores the input in its inside and sends the state to a display part 3 as a signal to display it. Consequently, a music selectable range is displayed in one display line A, selected music numbers are successively turned off and the music numbers are lighted on the other display line B. The selectable range can be always displayed by both the display lines and the selected state can be always checked by the display line B.
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