A method for generating a music file for recording user performance may include: detecting, by a sensor, an event indicating a status change of an execution device of the keyboard instrument; generating, by the sensor, a signal corresponding to the detected event; receiving, by a processor, the signal; and generating, by the processor, a music file based on the signal. In some embodiments, the execution device may include a weight lever. The weight lever may a concrete structure in the keyboard instrument to simulate a rebound force generated by hammer striking on string, by striking on an elastic structure. In some embodiments, a rebound force for a first weight lever may be different from a rebound force for a second weight lever by adjusting parameters of the elastic structure or the weight lever.

The present disclosure relates to an apparatus, system, and method that allow non-musicians to compose and perform a musical composition. Although some existing electronic devices can provide a virtual environment to compose and play musical sound digitally, manipulating such a virtual environment can be difficult and may require specific software expertise, as well as knowledge of music theory. The present disclosure provides a platform that facilitates the creation of a musical composition without such software expertise or knowledge of music theory. The platform models a musical composition as a simultaneous playback of one or more musical contents. The platform allows players to control or modify one or more of the plurality of musical contents to generate or synthesize a musical composition.

A sensing system for a keyboard. Each key sensor comprises passive and active resonant circuits. The passive resonant circuit has a resonant frequency and the active resonant circuit excites the passive resonant circuit at the resonant frequency. A sensor driver drives the active resonant circuit with an RF drive signal, a multiplexing system multiplexes the drive signal such that simultaneously driven key sensors are separated by at least (k?1) keys, and a detector detects a level of RF signal from a driven key sensor for sensing a position and/or velocity of a key.

A manual vibrato control device, system and processing arrangement are disclosed. A manual vibrato includes a rotatable shaft, a raised cam section on the shaft, first and second biased collars received on the shaft either side of the cam section, the bias of the first collar being rotationally opposite to the bias of the second collar such that as the shaft rotates in one direction, it receives a return force from the first collar but does not rotate the second collar, and vice versa.

Also disclosed are processing techniques to take the rotational data from rotational sensors, preferably Hall Effect, on the shaft and generate pitch change instructions for a pitch modification device. The mapping is user controllable to produce desired effects and performance.

The present disclosure describes a number of embodiments related to devices, systems, and methods locating a an object using ultra-wide band (UWB) radio transceivers embedded in carpet or other flexible material that may be rolled up and moved to various locations. Once in a location, the carpet may be unrolled and the multiple embedded radio transceivers may receive a signal from a tag attached to the object sending UWB radio signals. Based on the signals received by the UWB radio transceivers, various processes including time-difference on arrival, time-of-flight, and phase shift may be used to determine the location or the movement of the object.

A wearable sensor system is disclosed that provides a measurable magnetic field that changes horizontally within the range of motion of human limbs. The wearable sensor system includes a magnetic sensing device, and one or more magnet devices that provide the measurable magnetic field with a strength exceeding the Earth's magnetic field. To this end, the magnetic sensing system provides a personal magnetic field about a user, with that magnetic field traveling with the user and overpowering adjacent interfering fields. The wearable sensor system may include a sensor arrangement that measures a strength of the personal magnetic field and field direction to perform horizontal localization, and may send a representation of a same to a remote computing device to cause an action to occur. Some such actions include output of pre-recorded or synthesized musical notes, for example.

The present disclosure describes a number of embodiments related to devices, systems, and methods locating a an object using ultra-wide band (UWB) radio transceivers embedded in carpet or other flexible material that may be rolled up and moved to various locations. Once in a location, the carpet may be unrolled and the multiple embedded radio transceivers may receive a signal from a tag attached to the object sending UWB radio signals. Based on the signals received by the UWB radio transceivers, various processes including time-difference on arrival, time-of-flight, and phase shift may be used to determine the location or the movement of the object.

A first coil includes a first portion and a second portion disposed along a first axis. A second coil includes a third portion facing the first portion and a fourth portion facing the second portion. In the direction of the first axis, a first outer dimension of the first portion is equal to or smaller than a third outer dimension of the third portion, and a second outer dimension of the second portion is equal to or smaller than a fourth outer dimension of the fourth portion. A first distance between the centers of the first portion and the second portion is larger than a second distance between the centers of the third portion and the fourth portion, and the centers of the third portion and the fourth portion are positioned between the centers of the first portion and the second portion in the direction of the first axis.

A musical instrument with novel configurations and performance techniques that can play notes and scale tones is disclosed. The musical instrument implements design and ergonomic changes to a Theremin's traditional configuration and use. The musical instrument includes an additional sound generation device such as an actuator that is operated to provide rhythm and tonal results. The musical instrument includes a pitch antenna that is configured in a horizontal position, which creates a different plane of reference with respect to performance motions employed for modifying the pitch. The musical instrument allows for a user to play notes and scale tones in a standing, seated, or ambulatory position. Improved playing interfaces, accessory items, and other characteristics for enhancing the playing of the musical instrument are provided.

The present disclosure relates to an apparatus, system, and method that allow non-musicians to compose and perform a musical composition. Although some existing electronic devices can provide a virtual environment to compose and play musical sound digitally, manipulating such a virtual environment can be difficult and may require specific software expertise, as well as knowledge of music theory. The present disclosure provides a platform that facilitates the creation of a musical composition without such software expertise or knowledge of music theory. The platform models a musical composition as a simultaneous playback of one or more musical contents. The platform allows players to control or modify one or more of the plurality of musical contents to generate or synthesize a musical composition.