A keyboard with strum string apparatus for creating accurate guitar sounds with an electronic keyboard includes a microcontroller is coupled within a keyboard body. A power source, a pair of speakers, a plurality of control buttons, and a plurality of piano keys are coupled to the keyboard body and are in operational communication with the microcontroller. A plurality of piano keys is coupled to the keyboard body. A strum board is coupled to the keyboard body. The strum board has a strum base coupled to the keyboard body, a pair of bridges coupled to the strum base, a plurality of strings extending between the pair of bridges, and a pickup coupled to the strum base. The pickup is in operational communication with the microcontroller.

A keyboard with strum string apparatus for creating accurate guitar sounds with an electronic keyboard includes a microcontroller is coupled within a keyboard body. A power source, a pair of speakers, a plurality of control buttons, and a plurality of piano keys are coupled to the keyboard body and are in operational communication with the microcontroller. A plurality of piano keys is coupled to the keyboard body. A strum board is coupled to the keyboard body. The strum board has a strum base coupled to the keyboard body, a pair of bridges coupled to the strum base, a plurality of strings extending between the pair of bridges, and a pickup coupled to the strum base. The pickup is in operational communication with the microcontroller.

A hum-cancelling system includes two or more hum-cancelling coils configured in a distributed manner, connected in series with each other. The hum-cancelling coils form a series circuit that is electrically connected to at least one pickup. Each hum-cancelling coil includes a top plate, a bottom plate, and a coil of wire wrapped between the top plate and the bottom plate.

A hum-cancelling system includes two or more hum-cancelling coils configured in a distributed manner, connected in series with each other. The hum-cancelling coils form a series circuit that is electrically connected to at least one pickup. Each hum-cancelling coil includes a top plate, a bottom plate, and a coil of wire wrapped between the top plate and the bottom plate.

A musical instrument having a hollow or semi-hollow body and a sound board, representing either the anatomical front surface or the anatomical rear surface of the hollow body, or with the front surface and the rear surface both functioning as a sound board for the musical instrument and having at least one tuned sound port located in either the front and/or rear sound board of the musical instrument through which sound can exist with the tuned sound port comprising a hollow member adapted to be inserted through a hole formed in one or both of the sound boards and having a central opening of predetermined geometry and a length extending a fixed distance from the sound board into the interior of the musical instrument of between 5% and 95% of the distance between the front rear sound surfaces of the musical instrument. The musical instrument is preferably a stringed musical instrument which may include a plurality of panels extending between the front and rear sound boards for enhancing the structural support of the musical instrument and for funneling sound through the tuned sound ports or alternatively the musical instrument may include a plurality of panels extending between the front and rear surfaces without a tuned sound port.

A hum-cancelling system includes two or more hum-cancelling coils configured in a distributed manner, connected in series with each other. The hum-cancelling coils form a series circuit that is electrically connected to at least one pickup. Each hum-cancelling coil includes a top plate, a bottom plate, and a coil of wire wrapped between the top plate and the bottom plate.

Methods and devices for enabling authentication may include a first stage in which a first electronic device of the first entity communicates with a second electronic device of the second entity via a telecommunications network. During the first stage, the first electronic device generates a first token and transmits it from the first electronic device to the second electronic device via the network; and the second electronic device generates a third token and transmits the third token to the first electronic device via the network. During a second stage, authenticating a first non-authenticated entity as being the second entity as a function of a second token contained in a first portable electronic device of the first non-authenticated entity occurs; and authenticating a non-authenticated entity as being the first entity as a function of a fourth token contained in a second portable electronic device of the second non-authenticated entity also occurs.

A musical instrument having a hollow or semi-hollow body and a sound board, representing either the anatomical front surface or the anatomical rear surface of the hollow body, or with the front surface and the rear surface both functioning as a sound board for the musical instrument and having at least one tuned sound port located in either the front and/or rear sound board of the musical instrument through which sound can exist with the tuned sound port comprising a hollow member adapted to be inserted through a hole formed in one or both of the sound boards and having a central opening of predetermined geometry and a length extending a fixed distance from the sound board into the interior of the musical instrument of between 5% and 95% of the distance between the front rear sound surfaces of the musical instrument. The musical instrument is preferably a stringed musical instrument which may include a plurality of panels extending between the front and rear sound boards for enhancing the structural support of the musical instrument and for funneling sound through the tuned sound ports or alternatively the musical instrument may include a plurality of panels extending between the front and rear surfaces without a tuned sound port.

A stringed musical instrument and method of constructing a stringed musical instrument, having a body with a hollow or semi-hollow interior, a front and rear sound board disposed on opposite sides of the hollow interior, a single set of strings and a dual bridge and saddle assembly extending between the front and rear sound board with the dual bridge and saddle assembly including a first bridge and saddle mounted upon the front sound board, a second bridge and saddle mounted upon the rear sound board and with said single set of strings being strung such that the single set of strings interconnect the first bridge and front sound board to the second bridge and rear sound board through the interior body of the musical instrument for generating sound from each sound board respectively.

A saddle for a stringed musical instrument, which includes a bridge plate attached to a sound board corresponding to an anatomical surface of the musical instrument with the bridge having a slot with a geometry adapted to receive the saddle, comprising a body having at least one member with a first and second section in which the first section, in cross section has opposite ends, and a geometry conforming to the geometry of the slot in the bridge and a width approximately equal in dimension to the width of the slot in the bridge so that the opposite ends of the first section tightly fit into the slot of the bridge when the first section is inserted therein and with the second section having a width substantially wider than the width of the first section and having two lateral sides, in cross section, extending from the opposite ends of the first section to form, in combination with the first section, a T fitting such that the saddle possesses a substantially higher resistance to bending forces from tension in the strings in the musical instrument as compared conventional saddle structures.