A wireless audio streaming system for swimmers and underwater applications uses directional transmission antennas, one or more reception antennas worn on a user, and a combination of radio frequency and near-field magnetic induction communication, for streaming audio to a swimmer, buffering the streamed audio, and allowing the user to play the audio on a wireless, waterproof headset.

A wireless audio streaming system for swimmers and underwater applications uses directional transmission antennas, one or more reception antennas worn on a user, and a combination of radio frequency and near-field magnetic induction communication, for streaming audio to a swimmer, buffering the streamed audio, and allowing the user to play the audio on a wireless, waterproof headset.

Example techniques relate to playback queue subscriptions. An example implementation involves a computing system receiving, from a first computing device associated with a first user account, an instruction to enable subscription to a first playback queue associated with a first media playback system. In response to the instruction, the computing system enables second user accounts to subscribe to the first playback queue. The second user accounts are registered with respective second media playback systems in respective second household. The computing system receives, from a particular second media playback system, a request to subscribe to the first playback queue; and in response, sends one or more messages that update a control interface of the first control device to display a subscriber indication and (ii) sends one or more messages that populate a second playback queue of the particular second media playback system with audio tracks of the first playback queue.

The present disclosure relates to a sound source file structure, to output lyrics as audible sounds right before melodies corresponding to the lyrics start, to help a user to remind the lyrics based on accompaniment for a song after the accompaniment starts to be provided, and to help the user to sing based on correct lyrics corresponding to the melodies. The sound source file structure may include one or more backing sound source layers in which backing sounds based on beats and rhythms are placed, a melody sound source layer in which melody notes corresponding to lyrics based on beats and rhythms and a rest section corresponding to a rest are placed, and a lyric voice source layer in which a lyric voice is placed at a position corresponding to a rest section.

Provided are a method and device for audio mixing, and non-transitory computer-readable medium. The method comprises: acquiring a current system volume parameter of a terminal apparatus; adjusting an audio mixing parameter for audio material according to the system volume parameter and a frequency range of the audio material; performing audio mixing processing on the audio material according to the audio mixing parameter; and playing the processed audio material. In the invention, an audio mixing parameter of audio material can be adjusted according to an acquired current system volume parameter of a terminal apparatus and a frequency of the audio material, thereby applying different audio mixing parameters to the audio material according to different system volume parameters, and accordingly playing the audio material according to the audio mixing parameters.

An audio signal processing device includes a first input terminal which receives an audio signal from a record player, a memory which stores a correction parameter for audio signal processing and characteristic information indicating the characteristic of an audio signal for measurement, a signal processing circuit which performs the audio signal processing on the audio signal received based on the correction parameter, and a microcomputer. The microcomputer measures the sound characteristic of the audio signal received when the audio signal for measurement recorded on a phonograph record for measurement are reproduced, generates the correction parameter based on a result of comparison between the result of the measurement and the characteristic information, and stores, in the memory, setting information and the correction parameter generated, in association with each other, the setting information indicating a setting on the audio signal processing when the measurement is performed.

Example techniques relate to playback queue subscriptions. An example implementation involves a computing system receiving, from a first computing device associated with a first user account, an instruction to enable subscription to a first playback queue associated with a first media playback system. In response to the instruction, the computing system enables second user accounts to subscribe to the first playback queue. The second user accounts are registered with respective second media playback systems in respective second household. The computing system receives, from a particular second media playback system, a request to subscribe to the first playback queue; and in response, sends one or more messages that update a control interface of the first control device to display a subscriber indication and (ii) sends one or more messages that populate a second playback queue of the particular second media playback system with audio tracks of the first playback queue.

Methods and apparatus for gathering research data indicating exposure to media are disclosed. An example apparatus includes a first wireless receiver to receive a first modulated audio signal via a wireless data connection from a media device using a wireless communication protocol, the first modulated audio signal associated with the media, the first wireless receiver to output a baseband audio signal corresponding to the first modulated audio signal. The example apparatus includes a first wireless transmitter to modulate the baseband audio signal to form a second modulated audio signal, the first wireless transmitter to transmit the second modulated audio signal to wireless headphones using the wireless communication protocol. The example apparatus includes a monitoring device to receive the baseband audio signal, and to generate research data identifying the media, the media device including a second wireless transmitter to transmit the first modulated audio signal to the first wireless receiver, and the wireless headphones including a second wireless receiver to receive the second modulated audio signal from the first wireless transmitter.

Methods and devices are described for reducing the audible effect of pre-responses in an audio signal. The pre-responses are effectively delayed by employing a digital non-minimum-phase filter, which includes a zero lying outside the unit circle in its z-transform response. This zero is not paired with another zero at a reciprocal position inside the unit circle, as this would linearise the phase modification. The filtering can introduce a greater group delay at the pre-response frequency than at a low frequency, such as 500 Hz or even 0 Hz. The technique can be used to reduce pre-responses in an existing audio signal and also to pre-empt pre-responses that would be introduced to the audio signal by subsequent processing.

A digital camera with audio, visual and motion analysis includes a digital processor, an input processing system, and one or more imaging sensors, sound sensors, and motion sensors. In a non-limiting embodiment, the input processing system including non-transitory computer readable media including code segments, executable by the digital processor, for real-time audio, visual and motion analysis to develop a digital model of an ambient environment of the digital camera from data derived from the imaging sensor(s), sound sensor(s) and motion sensor(s).