An amplifier device has a high output speaker, which is connected a printed circuit board (PCB) mounted within said amplifier housing. A digital signal processor circuit is contained within the PCB board to filter out the low frequency sounds. The amplifier device also has a rechargeable battery connected to the PCB board. The amplifier housing is wrapped in an outer rubber housing mounted on a suction cup for adhering to an electric guitar. The amplifier device has control panel buttons built into the device to customize the sound produced through the speaker such as distortion, chorus and reverb.

An acoustic guitar is provided that includes a neck and a body. The acoustic guitar also includes a user interface module including an audio effect module configured to implement one or more audio effects, and one or more effect controllers, with each effect controller being configured to set a level of a corresponding audio effect implemented by the audio effect module. The user interface module further includes at least one input blend controller and a voice controller configured to allow a user to select a patch from a plurality of available patches, with each patch of the plurality of available patches comprising a configuration of one or more audio effects set at various levels to arrive at a desired effect template.

An acoustic guitar is provided that includes a neck and a body. The acoustic guitar also includes a user interface module including an audio effect module configured to implement one or more audio effects, and one or more effect controllers, with each effect controller being configured to set a level of a corresponding audio effect implemented by the audio effect module. The user interface module further includes at least one input blend controller and a voice controller configured to allow a user to select a patch from a plurality of available patches, with each patch of the plurality of available patches comprising a configuration of one or more audio effects set at various levels to arrive at a desired effect template.

By controlling key-pressing/key-releasing of keys 2a so a pressed key quantity Np is equal to or less than a maximum pressed key quantity Mp less than a maximum control quantity, the quantity of keys 2a capable of being released among the maximum control quantity Mc can be secured. Accordingly, key-releasing control of keys 2a during key-releasing can continue even when key-pressing is instructed for most keys 2a. Thus, the discomfort of listeners for key-releasing can be reduced. In addition, with keys 2a on which only key-releasing that consumes less power than key-pressing is performed being secured among the keys 2a of the maximum control quantity Mc, the power consumption required by the keyboard 2 during automatic operation is reduced, and the power capacity of an electronic piano 1 can be reduced. Accordingly, the increase in cost with respect to the power source of the electronic piano 1 can be suppressed.

An apparatus, system, and method for an electronic handheld musical instrument that generates electronic signals for processing by a processor-based module to generate musical sounds adapted to replicate non-electronic traditional hand percussion and other handheld instruments, is provided. A piezoelectric-based trigger is secured in an enclosed volume or enclosure formed in the electronic handheld musical instrument. When manipulated by a musician in a normal fashion, freely moving beads float or travel within the enclosure of the electronic handheld musical instrument and strike against a sensitive face of the piezoelectric transducer device to create a desired sound effect.

An amplifier device has a high output speaker, which is connected a printed circuit board (PCB) mounted within said amplifier housing. A digital signal processor circuit is contained within the PCB board to filter out the low frequency sounds. The amplifier device also has a rechargeable battery connected to the PCB board. The amplifier housing is wrapped in an outer rubber housing mounted on a suction cup for adhering to an electric guitar. The amplifier device has control panel buttons built into the device to customize the sound produced through the speaker such as distortion, chorus and reverb.

A percussion instrument comprising an energy harvesting device is disclosed, embodiments take the form of a percussion shaker and a drum, various implementations are disclosed for harvesting kinetic energy from motion imparted to the instrument and converting it to electrical energy for later use and for transfer to an external device.

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.

A musical instrument connection and extension system that easily and quickly connects musical amplification, effects pedals, rack mounted effects systems and components, wireless connectivity and power distribution for use with musical instruments. Audio stage equipment multiplexing/demultiplexing system comprising: Front station (30), multi wire cable (101), back station (20). The invention concerns several options for the mechanical arrangements of plugs, connectors, aggregated cables, DC power, both in the front stage station and in the back station. On stage effect pedals, switches or foot-pedals are thus provided with DC power from the back stage station and can be connected more efficiently, reducing the number of external power supplies and cords.

The present invention provides an Effector Power Adapter for connecting an effector, the Effector Power Adapter includes a power supply module, at least one first voltage transformation module and multiple voltage output ports, wherein the voltage output port has at least one first voltage transformation output port. The first voltage transformation module is electrically connected to the power supply module and the first voltage transformation output port, and the first voltage transformation module controls the first voltage transformation output port to output numerically continuously adjustable voltages. The present invention further provides an Effector Working System, which has an effector and the above effector power adapter. The Effector Power Adapter and the Effector Working System provided by the present invention can apply different voltages to an effector to produce different sound effects, which enriches the playing effect and offers more musical creation space for music practitioners.