Techniques and systems for facilitating the calibration of oscillation frequencies for an analog audio synthesizer are disclosed. Included are embodiments for performing the initial calibration of an audio synthesizer and for continuously compensating for the frequency irregularities which originate from insufficient calibration and/or frequency drift of the oscillator circuits. Embodiments can utilize the microcontroller already present in most synthesizers and require no further hardware.

Techniques and systems for facilitating the calibration of oscillation frequencies for an analog audio synthesizer are disclosed. Included are embodiments for performing the initial calibration of an audio synthesizer and for continuously compensating for the frequency irregularities which originate from insufficient calibration and/or frequency drift of the oscillator circuits. Embodiments can utilize the microcontroller already present in most synthesizers and require no further hardware.

Disclosed are a method and apparatus for producing sounds in a virtual world, as well as a sound card. The method comprises the steps of determining a spring mass model of an object in the virtual world based on a 3D model of the object; analyzing force components produced on the 3D model by a collision in the virtual world; and generating sounds produced by the collision according to the spring mass model and the force components. By considering sound material of the object in the virtual world, the method, apparatus, and sound card may produce sounds in the virtual world more vividly and in real time.

An electronic musical instrument is provided with a voice sensor for detecting a voice uttered by a user, when the user blows into the musical instrument with a voice, a breath sensor for detecting at least one of a blow pressure and a blow volume in a body of the musical instrument, when the user blows into the musical instrument with a voice, and a musical tone controlling unit for controlling generation of a musical tone based on at least one of outputs of the voice sensor and the breath sensor.

A method of modeling a characteristic of a non-linear system, comprises feeding testing input signals into the non-linear system to obtain testing output signals corresponding to the testing input signals, wherein the testing input signals include a first testing input signal and the testing output signals include a first testing output signal, identifying occurrences when an output level state in at least one specific frequency band of the first testing output signal significantly changes under the first testing input signal so as to obtain a first profile, and modeling the characteristic based on the first profile.

A system for reproducing synthetic engine sound in at least one listening position of a listening room is described. In accordance an example of, the system includes a model parameter database including various pre-defined sets of model parameters. An engine sound synthesizer receives at least one guide signal and is configured to select one set of model parameters in accordance with the at least one guide signal. The engine sound synthesizer generates a synthetic engine sound signal in accordance with the selected set of model parameters. At least one loudspeaker is used for reproducing the synthetic engine sound. The system further includes one of the following: (1) an equalizer and (2) a model parameter and the effect of the listening room on the resulting acoustic signal is approximately compensated at the one listening position.

A system for reproducing synthetic engine sound in at least one listening position of a listening room is described. In accordance an example of, the system includes a model parameter database including various pre-defined sets of model parameters. An engine sound synthesizer receives at least one guide signal and is configured to select one set of model parameters in accordance with the at least one guide signal. The engine sound synthesizer generates a synthetic engine sound signal in accordance with the selected set of model parameters. At least one loudspeaker is used for reproducing the synthetic engine sound. The system further includes one of the following: (1) an equalizer and (2) a model parameter and the effect of the listening room on the resulting acoustic signal is approximately compensated at the one listening position.

Embodiments of the disclosure relate to a method, apparatus, device, and storage medium for audio processing. The method provided herein includes: obtaining a first media content input by a user, the first media content including a first audio content corresponding to a singing content; and providing a second media content based on a selection of a target timbre by the user, the second media content including a second audio content corresponding to the singing content, and the second audio content corresponding to the selected target timbre. In this way, the embodiments of the disclosure can convert the first audio content in the audio corresponding to the singing content into a specified timbre, thereby improving the voice changing effect while retaining the timbre.

The invention relates to systems and processes for producing a synthesized sound with based on vibration-driven analog signals. In one aspect, a synthesized sound is produced with a musical instrument by generating a volume envelope with a voltage generator, generating a wave shape with a pitch modifier, merging the volume envelope from the voltage generator and the wave shape from the pitch modifier to create a synthesized signal, and modifying the synthesized signal using a synthesizer interface. The voltage generator includes an electronic pickup and a magnetic resonance actuator that is positioned above and oriented parallel to the electronic pickup.

The present invention relates to a face alignment virtual piano system using computer vision technology. Traditionally, projector-based virtual pianos are centered on the projection, this limits the size of virtual pianos. The system circumvents this issue by utilizing facial landmark tracking to accurately and dynamically adjust the virtual keyboard's alignment based on the user's face position. In doing so the position of the keyboard is no longer fixed to the position of the projection, but rather it is determined by the user's position. This not only significantly enhances the freedom of movement of the user, but also allows for the possibility of full 88-key pianos.