Power control devices are provided with electrically isolated outputs. One exemplary power control device comprises control electronics configured to: (i) receive a power signal from a DC power source, wherein the control electronics comprise an input ground for the DC power source; and (ii) provide multiple outputs, wherein the multiple outputs is supplied power from the DC power source; wherein the multiple outputs comprise at least one output that is electrically isolated from at least one other output of the multiple outputs that each provide power to one or more of a plurality of loads, wherein the electrical isolation is based on the at least one output having a first output ground that is isolated from a second output ground of the at least one other output, and wherein the input ground, the first output ground, and the second output ground are electrically isolated from each other.

An electronic musical instrument is provided and includes: a musical tone processing circuit processing a musical tone signal; an output jack for connecting the musical tone signal to an amplifier; a phone jack for connecting the musical tone signal to a phone; a switch for turning power supply ON or OFF; and a control circuit that determines whether power supply is necessary and selects power supply from among first, second and third power based on information indicating each power receiving state of the first to third power (respectively from AC adapter, USB cable, and battery), information indicating whether an output plug is inserted into the output jack, a phone plug is inserted into the phone jack, the USB cable is connected to USB jack, and an ON or OFF operation of the switch is performed, and information indicating a power supply ON or OFF state of the electronic musical instrument.

A spontaneous audio tone inducing system, machine, and method of use.

The present disclosure relates to a device and system for eliminating and replacing batteries in any instruments with active electronics, preamp, and piezo pickups. The accessory device and systems have a combination of quarter-inch audio and nine-volt power cable and the methods thereof. Both mono and stereo versions of the apparatus and systems are presented herein. The device further has a mock batter that can power other instruments. Battery leakage can cause corrosion in the instrument. Therefore, the device protects the instrument from corrosive harm, and the electrical device reduces the cost associated with battery usage and the operator's business's overall cost.

A system and apparatus are disclosed for coupling effect pedals used by musicians and other audio performance artists to a signal processing chain and to a power source. Power is provided to effect pedals wirelessly by inductive coupling, and effect pedals may be coupled to a signal processing chain through cables or wirelessly.

Provided are an electric musical instrument system and a control method thereof. The electric musical instrument system includes a musical sound transmitting means having a first mode and a second mode that consumes less electric power than the first mode. The musical sound transmitting means has a detecting means for detecting rocking of a musical instrument and a transmitting means that transmits an audio signal emitted from the musical instrument to the musical sound receiving means in the first mode and transmits, when detecting rocking of the musical instruments, detected information to the musical sound receiving means in the second mode. The musical sound receiving means has a controlling means that processes the audio signal received in the first mode and cancels the second mode and changes the mode to the first mode when the detected information is received in the second mode.

A communication device for an electronic musical instrument includes a battery; an input terminal that is connected to a MIDI output terminal of the electronic musical instrument; an output terminal that is connected to a MIDI input terminal of the electronic musical instrument; a control unit that transmits and receives various kinds of electronic information between the electronic musical instrument and the other electronic instrument via the input terminal and the output terminal; and a switching unit that switches between taking in electric power to be supplied to the control unit through a MIDI signal line from the electronic musical instrument via the input terminal and taking in the electric power from the battery in accordance with a communication state of the control unit.

An electronic musical instrument is provided and includes: a musical tone processing circuit processing a musical tone signal; an output jack for connecting the musical tone signal to an amplifier; a phone jack for connecting the musical tone signal to a phone; a switch for turning power supply ON or OFF; and a control circuit that determines whether power supply is necessary and selects power supply from among first, second and third power based on information indicating each power receiving state of the first to third power (respectively from AC adapter, USB cable, and battery), information indicating whether an output plug is inserted into the output jack, a phone plug is inserted into the phone jack, the USB cable is connected to USB jack, and an ON or OFF operation of the switch is performed, and information indicating a power supply ON or OFF state of the electronic musical instrument.

A wireless communication device and a wireless communication method are provided. When a master mode is set in a mode memory, a mode setting notification is transmitted to a different wireless communication device. When a mode setting permission notification for the mode setting notification is received from the different wireless communication device, the master mode is settled as a communication mode, and the master mode is set in the mode memory. When a slave mode is set in the mode memory and when a mode setting notification is received from the different wireless communication device, the slave mode is settled as the communication mode, the slave mode is set in the mode memory, and a mode setting permission notification is transmitted to the different wireless communication device. Thus, the communication mode can be automatically set in a pair of wireless communication devices.

A wireless communication device and a wireless communication method capable of curbing occurrence of latency even when performing wireless communication at predetermined time intervals are provided. MIDI data is transmitted and received by communication (B) performed through a wireless module during an intermission between communications (A) performed at predetermined time intervals through the wireless module. Accordingly, a communication speed for wireless communication is improved. Therefore, compared to a case in which wireless communication is performed by only the communication (A), MIDI data can be quickly transmitted and received, and thus occurrence of latency can be curbed.