Abstract: A pedal percussion instrument includes a base, a pedal, a connecting member, a rotating body, a shaft pivotally connecting the rotating body, a striking part rotating about the shaft and a stricken part. The shaft is located between an upper end and a lower end of the pedal part when the pedal part is not being operated. The striking part is disposed on a side opposite to the pedal part with the shaft interposed therebetween and is disposed on a side lower than the stricken part when the pedal part is not being operated. The pedal part rotates in one direction with respect to the base, the rotating body rotates via the connecting member in an other direction with respect to the base. The stricken part is struck by the striking part through a rotation of the rotating body in the other direction in a predetermined angle.

Abstract: A pedal percussion instrument includes a base, a pedal, a connecting member, a rotating body, a shaft pivotally connecting the rotating body, a striking part rotating about the shaft and a stricken part. The shaft is located between an upper end and a lower end of the pedal part when the pedal part is not being operated. The striking part is disposed on a side opposite to the pedal part with the shaft interposed therebetween and is disposed on a side lower than the stricken part when the pedal part is not being operated. The pedal part rotates in one direction with respect to the base, the rotating body rotates via the connecting member in an other direction with respect to the base. The stricken part is struck by the striking part through a rotation of the rotating body in the other direction in a predetermined angle.

Abstract: An operating device for use with a musical instrument may allow for a supporting member configured to be supported by a user to be operatively connected to a percussion instrument with a case, which may contain an electronic circuit for processing a signal produced by striking a striking surface of the percussion instrument. The case may be arranged between the electronic percussion instrument and the supporting member. The case and the electronic percussion instrument may be configured to be moveable relative to the user.

Abstract: An operating device for use with a musical instrument may allow for a supporting member configured to be supported by a user to be operatively connected to a percussion instrument with a case, which may contain an electronic circuit for processing a signal produced by striking a striking surface of the percussion instrument. The case may be arranged between the electronic percussion instrument and the supporting member. The case and the electronic percussion instrument may be configured to be moveable relative to the user.

Abstract: An optical disc device comprises a tracking position error signal generation unit for outputting a first reflection light amount signal that is generated by performing addition or subtraction on the amounts of reflected light from an optical disc, and is used for control in the direction of the radius of the optical disc; an amplitude measurement unit for determining an amplitude of the first reflection light amount signal; and a balance control unit for controlling the balance of a second reflection light amount signal that is generated by performing addition or subtraction on the amounts of reflected light from the optical disc so that the amplitude obtained by the amplitude measurement unit becomes maximum, and is used for control in the vertical direction of the optical disc.