Abstract: A stringed musical instrument includes: a musical instrument body configured such that a string is attached thereto; a pickup configured to: i) detect vibration of the string and ii) output a string vibration signal according to the vibration; a detection sensor that is: i) attached to the musical instrument body and ii) configured to output a detection signal according to a force applied to the musical instrument body; and a controller that is attached to the musical instrument body, and is configured to output, based on the detection signal, a control signal configured to control an operation of an effector configured to impart an effect to the string vibration signal.

Abstract: A wireless power supply system to for musical instrument comprises: a power supply device which is configured to wirelessly transmit microwaves, and a first power receiving device which is attached to a first musical instrument. The first power receiving device is configured to: receive the wirelessly transmitted microwave, and generate a first electric power from the received microwave, wherein the first electric power is supplied to at least one of a first electronic device installed in the first musical instrument and a first battery installed in the first musical instrument.

Abstract: An acoustic processing device includes: a plurality of loudspeaker units that output sound; and a mechanism that is configured to be capable of changing a distance between the loudspeaker units.

Abstract: An acoustic processing device includes: a plurality of loudspeaker units that output sound; and a mechanism that is configured to be capable of changing a distance between the loudspeaker units.

Abstract: A loudspeaker device includes: an output control unit that causes a sound to be output from a loudspeaker in a case where a headphone device and the loudspeaker device are connected to each other. The sound is generated based on sound data transmitted from the headphone device that has received the sound data through wireless communication from a sound output device. The headphone device is configured to output a sound from a headphone.

Abstract: A circuit includes: a signal processing unit which is configured to perform signal processing; an amplifying unit which is configured to amplify a signal output from the signal processing unit; a first power supplying path which is extended from a battery to the signal processing unit; a second power supplying path which is branched from the first power supplying path, and which is extended to the amplifying unit; a power limiting unit which is provided in the second power supplying path, and which is configured to limit power flowing in the second power supplying path; and a capacitor which is connected to the second power supplying path, and which is configured to supplement power to be supplied to the amplifying unit.

Abstract: A circuit includes: a signal processing unit which is configured to perform signal processing; an amplifying unit which is configured to amplify a signal output from the signal processing unit; a first power supplying path which is extended from a battery to the signal processing unit; a second power supplying path which is branched from the first power supplying path, and which is extended to the amplifying unit; a power limiting unit which is provided in the second power supplying path, and which is configured to limit power flowing in the second power supplying path; and a capacitor which is connected to the second power supplying path, and which is configured to supplement power to be supplied to the amplifying unit.

Abstract: A timbre selector includes a first signal processing unit, a second signal processing unit and a first switch. The first signal processing unit includes a first input terminal, a first filter and a first output terminal. The first input terminal receives a first tone signal. The first filter processes the first tone signal to generate a first processed signal. The second signal processing unit includes a second input terminal, a second filter and a second output terminal. The second input terminal receives a second tone signal. The second filter processes the second tone signal to generate a second processed signal. The first switch is connected to the first output terminal at the first position. The first switch is connected to the first and second output terminals at the second position. The first switch is connected to the second output terminal at the third position.

Abstract: A timbre selector includes a first signal processing unit, a second signal processing unit and a first switch. The first signal processing unit includes a first input terminal, a first filter and a first output terminal. The first input terminal receives a first tone signal. The first filter processes the first tone signal to generate a first processed signal. The second signal processing unit includes a second input terminal, a second filter and a second output terminal. The second input terminal receives a second tone signal. The second filter processes the second tone signal to generate a second processed signal. The first switch is connected to the first output terminal at the first position. The first switch is connected to the first and second output terminals at the second position. The first switch is connected to the second output terminal at the third position.