The invention provides a plug for an electronic plucked string instrument having a structure for fixing with a set screw by inserting a cable into a sleeve in a plug side. A biting convex portion biting into an insulated outer sheath while receiving a screwing compression force of a set screw via a cable is formed integrally on an inner peripheral surface of an attachment sleeve in a plug side along a peripheral direction of a sleeve inner peripheral surface. The biting convex portion formed on the inner peripheral surface of the attachment sleeve in the plug bites into the insulated outer sheath of the cable. Thus, a slip displacement against a sleeve inner surface of the cable is inhibited by the biting convex portion and a slack of the set screw can be effectively suppressed even in a case where a stronger tensile force is applied to the cable.

A power system on an electric guitar may include a cover plate covering a cavity in the electric guitar. A rechargeable power source may be contained within the cavity which may include circuitry. Other instruments or configurations may be used.

A sound controlling system including a user terminal having a sound source, a wireless communication device, a digital to analog converter (DAC) and first processing electronics. The first processing electronics are configured to: provide data of a backing sound to the sound source; control the sound source to generate a sound signal based on the data; receive a first input instruction including a first instruction to transmit the sound signal and a second instruction to play back the backing sound; provide the sound signal to the wireless communication device as the first input instruction being the first instruction, and provide the sound signal to the DAC as being the second instruction; control the wireless communication device to convert the sound signal to a wireless signal and transmit the wireless signal; and convert the sound signal from a digital signal to an analog signal for play back of the backing sound.

A specialized audio/instrument cable with built-in digital signal processing capabilities that adds digital audio sampling capabilities that allows the user to trigger synthesized sounds or virtual musical instruments from within the cable itself to affect the sound generated from an instrument or microphone such that the cable is the only connection needed between the instrument or microphone and an output device. Using voice recognition, the specialized cable can select an audio effects chain algorithm and/or sampled sound algorithm extrapolated from a musical digital audio fingerprint (MDAF) created from a desired musician's instrument to alter the sound of the input instrument's audio.

Battery powered devices are provided with electrically isolated outputs. One exemplary battery device comprises at least one battery; and control electronics configured to provide a plurality of outputs from one of the at least one battery, wherein the plurality of outputs comprise at least one output that is electrically isolated from at least one other output of the plurality of outputs that each provide power to one or more of a plurality of loads. In another exemplary battery device, the control electronics are configured to provide a plurality of outputs from one of the at least one battery, and further comprises a housing assembly comprising (i) at least two surfaces, wherein the at least two surfaces have a space therebetween configured to house the control electronics and the at least one battery; or (ii) a tubular structure configured to house the control electronics and the at least one battery.

This invention presents a modular circuit using a 3-gang pot to mix and compensate two signals, to produce an output of approximately uniform volume. One gang, Pga, physically simulates a pseudo-sine function, Q(x), where 0≤×≤1 is fractional pot rotation. A second gang, Pgb, physically simulates a pseudo-cosine function, R(x). The circuits using Pga & Pgb multiply the two input signals by the pseudo-functions, so that the length, SQRT(Q.sup.2+R.sup.2), of vector (Q,R) stays near one. The third gang, Pgc, modifies the gain of a summer/compensator op-amp, U3, which adds the two modified signals and compensates for variations in amplitude due to phase cancellations between the two input signals, maintaining an output of near-constant amplitude. A number of embodiments consider 3-gang pots with linear, custom nonlinear and mixed tapers. Any of the three gangs may be replaced by a digital pot, driven by a programmable processor. The functions Q(x) and R(x) are also the basis for full-cycle approximate sine and cosine functions, apsin & apcos, which can be used for forward and reverse spectral transformations to predict the output of such a modular circuit from the inputs as modified by the three gangs. The modules can be cascaded or otherwise combined to add more input signals to the output. The primary application is humbucking pair signals from hum-matched single-coil electric guitar pickups, but there may be applications in other fields.

A multifunctional guitar includes a guitar body, a handle detachably connected to the guitar body, a Bluetooth speaker, and a shock absorbing mechanism that connects the Bluetooth speaker to the guitar body.

Systems and methods for onboard, real-time pickup blending for electric guitars/basses may utilize every possible tonal combination that double coil pickups can offer. The industry standard pickup toggle switch may be removed from electric guitar/bass instruments. Instead of a user being limited to only using one pickup at a time to be selected, the user may mix in any combination of the pickups (top, bottom, or both) at any time. Accordingly, multiple pickups can be on at the same time and/or the user may blend in (or out) any percentage of any of the pickups that the user wishes to create a large combination of tones.

Systems and methods for creating a digital audio filter, such as an impulse response filter, using a pickup audio signal provided to an instrument signal capture device and a microphone signal provided to a mobile device are disclosed. In one embodiment, a method includes capturing a first audio signal using a signal capture device, performing frequency analysis on the digitized first audio signal to generate a frequency response spectrum representation, transmitting the frequency response spectrum representation of the first audio signal from the signal capture device to a mobile device, capturing a second audio signal using a microphone on the mobile device, performing frequency analysis on the at least one digitized second audio signal using the mobile device to generate a frequency response spectrum representation, and generating a digital audio filter from the frequency response spectrum representations of the first audio signal and the second audio signal.

A system includes an electric stringed instrument with a remotely controllable electronic configuration. A system includes a remote control for configuring the electronics of an electric stringed instrument. A system includes a remotely controllable electric stringed instrument, a remote control for configuring the instrument, a MIDI controller, and cords interconnecting the system.