[Technical problem] Circulatory sound regulation that changes environmental sound into input sound, converted sound with arbitrarily regulatory frequency component, arbitrarily regulatory amplitude or both of them, output sound, another input sound synthesized with this output sound and an environmental sound, and another converted sound made from this input sound. [Solution] Apparatus comprising: input means that receives environmental sound from arbitrary environment as an input sound; conversion means that converts the input sound into a converted sound that contains arbitrarily regulatory frequency component including frequency component that approximates to principle oscillator, arbitrarily regulatory amplitude or both; and output means that transmits the converted sound to environment as an output sound; whereby the input means receives synthetic sound synthesized with the output sound and environmental sound as an input sound again, and the conversion means converts this input sound further into another converted sound.

Methods and digital circuits provide frequency correction to frequency synthesizers. Dual switched-capacitor voltage detectors connected to an input signal periodically sample the voltage of the input signal, and then determine a fundamental frequency of the input signal from the output of the dual switched-capacitor voltage detectors. The sample period of the dual switched-capacitor voltage detectors is proportional to a time period between a previous pair of voltage peaks detected in the input signal, thereby eliminating harmonic components in the original signal which might otherwise cause errors in frequency estimation without causing unwanted sluggishness in the transient response of the frequency detection process. The time period between the previous pair of detected voltage peaks is used to create a decay signal that initiates a capacitor decay time for each voltage detector. Two additional digital methods of extracting the fundamental frequency as well as an envelope of an analog audio signal are also described, one utilizing a sliding sample rate, and the other utilizing a fixed sample rate.

An audio device simulation method includes acquiring a standard model that models input-output characteristics of an audio device, and setting at least one parameter of a target audio device of the same type as the audio device and measuring input-output characteristics of the target audio device, and generating an individual model that models input-output characteristics of the target audio device by correcting the standard model using measured input-output characteristics that have been measured.

A pressure measurement device for use with a musical instrument is provided. The pressure measurement devices has at least one inlet to receive air from a player of the musical instrument as the player plays the musical instrument. The pressure measurement device also has at least one sensor associated with the at least one inlet. The sensor is configured to sense information relating to pressure from the received air in real time as the musical instrument is played.

A pressure measurement device for use with a musical instrument is provided. The pressure measurement devices has at least one inlet to receive air from a player of the musical instrument as the player plays the musical instrument. The pressure measurement device also has at least one sensor associated with the at least one inlet. The sensor is configured to sense information relating to pressure from the received air in real time as the musical instrument is played.

The present disclosure relates to systems, methods, and devices for music simulation. The methods may include determining one or more simulation actions based on data associated with one or more simulation actions acquired by at least one sensor. The methods may further include determining, based on at least one of the one or more simulation actions and a mapping relationship between simulation actions and corresponding musical instruments, a simulation musical instrument that matches with the one or more simulation actions. The methods may further include determining, based on the one or more simulation actions, one or more first features associated with the simulation musical instrument. The methods may further include playing music based on the one or more first features.

One embodiment of the present application sets forth a method for simulating an audio output of a three-dimensional object that includes a resonant cavity. The method includes receiving an input mesh of a three-dimensional shape and a hole configuration. The input mesh has an outer surface and an internal cavity, and the hole configuration includes one or more holes. The method further includes adding the one or more holes to the three-dimensional shape based on the hole configuration to generate a modified three-dimensional shape having a resonant cavity. The resonant cavity includes the one or more holes and the internal cavity. The method further includes determining an air pressure coefficient matrix for the resonant cavity. The method further includes computing a minimum non-zero eigenvalue for the air pressure coefficient matrix. The method further includes determining an output resonant frequency for the resonant cavity based on the minimum non-zero eigenvalue.

Technologies are provided for adaptive control of bias settings in a digital microphone. In some embodiments, a device includes a first component that provides data indicative of a clock frequency of operation in a functional mode of a digital microphone. The clock frequency clocks one or more microphone components having switching activity. The device also can include a second component that determines, using the clock frequency, an amount of bias current to supply to at least a first microphone component of the one or more microphone components. The device can further include a memory device that retains control parameters that include at least one of a first subset of parameters defining a relationship between current and frequency and a second subset of parameters defining a quantization of the relationship. The quantization including multiple bias current levels for respective frequency intervals.

An electronic musical instrument is tonally controlled by the configuration of a user's mouth and lips. The present invention uses a generated frequency signal to excite a first frequency signal from the user's mouth and lips. The present invention then adjusts the generated frequency signal using a phase-locked loop controller to achieve a close match to the natural frequency of the user's mouth and lips. The generated frequency signal is then played back after processing.

The Thumb Bar Controller is a bar that runs the width of the electronic musical keyboard playing area, (plus whatever is needed for the lever attachment), connected by two armsrests just below the top, and approximately one inch away from the keys. It gives the performer control over two (or more) functions with the thumb of the playing hand, that would otherwise require the other hand or foot pedals, allowing a person with the disabilty of one arm/hand, to be as proficient as a person with two. It can be used for controlling pitch bend, modulation, MIDI specification controllers, various electronic controls, and product specific controls.

The bar can be attached in numerous ways, could use a variety of spring type mechanisms to control it. It can be mounted externally or made as an integral part of the keyboard, with openings for the bar connections and movement required.