A modular trigger system releasably attaches to a cymbal or other percussive element. The trigger system has a metal cover plate releasably affixable to a surface of the cymbal or percussive element, at least one piezo sensor releasably affixable to a surface of the cover plate, and a dampening element sandwiched between the undersurface of the cymbal or percussive element and the metal cover plate. The dampening element comprises a flexible thin sheet of rubber with a plurality of openings aligned with the piezo sensors.

A detecting device 100 detects an elastic wave propagating through the air. The detecting device100 includes: a first electrode 12 that is a plate having a cantilever structure with a fixed end FX and a free end FR and that vibrates by being bent by the elastic wave; and a second electrode 32 that is a plate, that is opposed to the first electrode, and that has a predetermined distance from the first electrode. The detecting device 100 detects the elastic wave on the basis of a change in capacitance between the first electrode and the second electrode 32. An end of the second electrode 32 in a direction from the fixed end FX to the free end FR is closer to the fixed end than the free end.

A method in accord with certain implementations involves, at an audio input, receiving a time domain audio signals; at one or more digital signal processors: converting the time domain audio signal to a frequency domain representation containing at least a fundamental frequency component, modifying the frequency domain representation to produce a modified frequency spectrum, converting the modified frequency spectrum to a modified time domain audio signal; and outputting the modified input signals as an output signal. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.

A method in accord with certain implementations involves, at an audio input, receiving a time domain audio signals; at one or more digital signal processors: converting the time domain audio signal to a frequency domain representation containing at least a fundamental frequency component, modifying the frequency domain representation to produce a modified frequency spectrum, converting the modified frequency spectrum to a modified time domain audio signal; and outputting the modified input signals as an output signal. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.

An electronic percussion instrument for suppressing sound source noise is described. The instrument includes a percussion pad, a metal plate disposed below the percussion pad, at least one damping element disposed in a ring-like manner below the metal plate, a resonance conductive member disposed below the damping element, a sensor disposed at a central region below the resonance conductive member, and a noise suppressing mechanism disposed at a peripheral annular region below the resonance conductive member. The noise suppressing mechanism includes, in an order from top to bottom, a foam ring and a metal ring. The metal ring has a plurality of cushioning elements thereon. Accordingly, the instrument can effectively suppress or otherwise eliminate interference on and noise sensed by the sensor caused by vibration of a casing when the percussion pad is percussed. This can greatly improve the sound effect and performance of the instrument.

An acoustic-to-electronic bass drum conversion kit describes the parts needed to convert an acoustic bass drum into an electronic bass drum trigger and amplification device. My invention includes a front panel assembly which has at least one loudspeaker mounted on a panel which fits over the front of a bass drum shell, and a rear panel assembly which has an amplifier and an impact sensitive kick pad mounted on a rear panel. After discarding the front and rear drum heads and hoops, the front and rear panel assemblies are attached to the bass drum shell using conventional lug, tension rod and claw bracket technology. My invention provides the desired look of an acoustic bass drum for drummers who desire an electronic drum amplification system.

A sound production control apparatus by which a sound production mode is controlled on the basis of a player's motion even during a non-playing control operation period. An information obtaining unit 30 obtains detection information by detecting a player's motion. A sound processing unit 36 produces sound on the basis of the detection information obtained in response to operation for generating a sound trigger in the player's motion, and controls a sound production mode on the basis of the detection information obtained in response to operation for generating no sound trigger in the player's motion.

A recording method acquires, from a first musical instrument which outputs playing data which represents playing information, playing data of playing by the first musical instrument; generates a first waveform signal according to the played sounds of the first musical instrument which correspond to the playing data; generates a second waveform signal according to a sound including a sound emitted from the first musical instrument and other sounds; generates a third waveform signal wherein the first waveform signal is subtracted from the second waveform signal; generates audio data from the third waveform signal; and records the audio data.

A recording method acquires, from a first musical instrument which outputs playing data which represents playing information, playing data of playing by the first musical instrument; generates a first waveform signal according to the played sounds of the first musical instrument which correspond to the playing data; generates a second waveform signal according to a sound including a sound emitted from the first musical instrument and other sounds; generates a third waveform signal wherein the first waveform signal is subtracted from the second waveform signal; generates audio data from the third waveform signal; and records the audio data.

Methods and apparatus to use predicted actions in VR environments are disclosed. An example method includes predicting a predicted time of a predicted virtual contact of a virtual reality controller with a virtual object, determining, based on at least one parameter of the predicted virtual contact, a characteristic of a virtual output the object would make in response to the virtual contact, and initiating producing the virtual output before the predicted time of the virtual contact of the controller with the virtual object.