| 摘要 |
PROBLEM TO BE SOLVED: To enable a user to easily recognize the instruction contents for playing including the instruction of manipulation to a pedal. SOLUTION: Pictures 201 expressing a musical instrument and various kinds of the foot pedals disposed at this musical instrument in a model-like manner are drawn on respective keys 105 and total four LEDs 203 to 205 are installed thereto. The three rectangular patterns of the pictures 201 express the soft pedal, softenute pedal and damper pedal, respectively, from a left side. The three LEDs 203 to 205 are respectively installed in compliance with the positions drawn with the patterns of the rectangular shape. As a result, the manipulation to these pedals is instructed by using the LEDs 203 to 205. The instruction of the manipulation to the keys 104 is executed by using the LED 202.
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