A foldable stringed instrument, for example in the form of a travel guitar that folds mid-neck to assume a reduced profile is described. The mid-neck folding is accomplished in a symmetrical manner about a three-part hinge located in the neck to configure the travel guitar into a reduced profile. The bridge assembly can be translated longitudinally relative to the head of the guitar to allow sufficient detensioning of the guitar strings to enable an upper portion of the neck to be folded away from a lower portion of the neck and/or body to assume a reduced profile. To deploy the travel guitar for playing, the upper portion of the neck is unfolded into alignment with the lower portion of the neck and/or body, and the bridge assembly translated longitudinally relative to the head and locked in position to allow the guitar to be tuned for playing.

An electronic switch for the upgrade of an electric stringed instrument for enhancing the musical or artistic performance of a user. The electronic switch has two parts. The first part consisting of a printed circuit board with terminals for wire connections. On the printed circuit board are solid state relays and other electronic components. They are electronically controlled by the second part that is an external user-controlled switch. The switch is an LED touch capacitance switch, also referred as but not limited to, a capacitance touch switch, or touch key. The capacitance touch switch has an LED light that changes colors from either a blue or green to red, but not limited to, indicating when the electronic switch is activated. When the LED touch capacitance switch activates the electronic switch board, the electronic switch board reroutes multiple signals that are attached to its terminal connectors. The electronic switch allows the user to route multiple signals at once with one touch of the LED touch capacitance switch. The LED touch capacitance switch consisting of an LED light that changes colors from either a blue or green to red, but not limited to, when touched allows the user to know the status of the electronic switch. Both parts of the electronic switch obtain power from some type of battery or super capacitor power source, but not limited to.

In one example, a method to match a digital amplifier model to a real guitar amplifier comprises obtaining an amplifier output filter and an amplifier input filter for the real guitar amplifier, using the amplifier output filter and a model output filter to obtain a corrective output filter, using the amplifier input filter and a model input filter to obtain a corrective input filter, and applying the corrective input filter and the corrective output filter to the digital amplifier model. The amplifier output filter and the amplifier input filter can be obtained using exponential sine sweep (ESS) and a matched filter. Other examples and related methods and apparatuses are also disclosed herein.

Systems and methods for pickup, mixing, and/or distribution of sound include use of a humbucker positioned within a sound hole of a stringed instrument. Generally, the humbucker is supported by a sound hole adaptor that, alone or in combination with the humbucker, preferably obscures a majority of the sound hole, but does not obscure the entirety of the sound hole. Such arrangement ultimately may enable broadcast of a first sound, acoustically from the sound hole, and a second sound, transduced from the humbucker.

An improved body for a stringed instrument wherein the base of the neck slides into a body pocket and onto a flexible protrusion, both made of the body material. The flexible protrusion is drawn toward the pocket by a fastener thereby clamping the base of the neck to the instrument body. No metal parts attach to the base of the neck. The only metal parts involved are the threaded fastener which draws the flexible protrusion toward the pocket and the threaded insert in the flexible protrusion to which this fastener threads. Most of the clamping assembly is hidden inside the body and neck and is not visible when the body and neck are connected. The neck can be removed and replaced rapidly allowing instrument storage in a smaller space and allowing necks of varying scale lengths, fret configurations, or fretboard radius to be attached to the same instrument.

An electronic vibrato system for a stringed instrument comprises an actuator and microcontroller which are disposed within a chassis. The control arm moves the actuator from a resting position to non-resting, rotated positions. The system is below a face of a stringed instrument such that the system has a disposed fulcrum within the instrument. The rotated positions impart resistive forces on said actuator and imparting control signals. The microcontroller processes said control signal and modulates pitch.

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 electric bowed string instrument structure comprises a longitudinally elongated frame (2) having a central recess (8) provided with a bottom (9), a fingerboard (5) anchored to the neck (4), a tailpiece (7) anchored to the rear end portion (6) of the frame (2), a plurality of strings (13) extending between the fingerboard (5) and the tailpiece (7), a bridge (12) adapted to support the strings (13), a pick-up (14) adapted to intercept the vibrations produced by the strings (13) and to be connected to sound amplifying means, a soundboard (11) interlocked in the recess (8) in a transversely offset position with respect to the bottom (9), the soundboard (11) being convex with a convexity facing towards the strings (11), the pick-up (14) being arranged below the soundboard (11).

A foldable stringed instrument, for example in the form of a travel guitar that folds mid-neck to assume a reduced profile is described. The mid-neck folding is accomplished in a symmetrical manner about a three-part hinge located in the neck to configure the travel guitar into a reduced profile. The bridge assembly can be translated longitudinally relative to the head of the guitar to allow sufficient detensioning of the guitar strings to enable an upper portion of the neck to be folded away from a lower portion of the neck and/or body to assume a reduced profile. To deploy the travel guitar for playing, the upper portion of the neck is unfolded into alignment with the lower portion of the neck and/or body, and the bridge assembly translated longitudinally relative to the head and locked in position to allow the guitar to be tuned for playing.

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.