| 摘要 |
PURPOSE:To prevent a roll bar from being misoperated with a hand operating the keyboard of a musical sound control unnecessary part by structuring the roll bar for musical sound control which is arranged along a keyboard so that its operation position is variable. CONSTITUTION:The wheel (roll bar) 3 for musical sound control which is a cylindrical rotary body having a rotary shaft is provided along the keyboard 2 in front of the keyboard 2 and a musical sound such as timbre, pitch, and loudness is controlled with the roll bar 3. Further, a cover 23 which is movable along the keyboard 2 is provided on the roll bar 3 of the musical sound adjustment unnecessary part of the keyboard 2, i.e. left accompaniment part to cover the roll bar 3 of this part, thereby inhibiting the roll bar from being rotated. Therefore, when an electronic musical instrument like this is played, the hand which plays the left keyboard part never touches the roll bar 3 because of the cover 23. Consequently, the roll bar 3 is never misoperated with the hand which operates the keyboard part. |
