Example techniques may involve performing aspects of a spatial calibration. An example implementation may include detecting a trigger condition that initiates calibration of a media playback system including multiple audio drivers that form multiple sound axes, each sound axis corresponding to a respective channel of multi-channel audio content The implementation may also include causing the multiple audio drivers to emit calibration audio that is divided into constituent frames, the multiple sound axes emitting calibration audio during respective slots of each constituent frame. The implementation may further include recording the emitted calibration audio. The implementation may include causing delays for each sound axis of the multiple sound axes to be determined, the determined delay for each sound axis based on the slots of recorded calibration audio corresponding to the sound axes and causing the multiple sound axes to be calibrated.

Methods and apparatus, including software, for collecting and managing public music performance royalties and royalty payouts are described. On the listeners side, song/audio fingerprint data is collected and transmitted to the rights owner side, where the rights owner side verifies the song/audio fingerprint data, calculates royalty payments, and in some cases, automates the royalty payments. Public music performance royalty payments are based on the song/audio fingerprint data collected by listeners/clients, as well as business logic servers.

An integrated cinema amplifier comprises a power supply stage that distributes power over a plurality of channels for rendering immersive audio content in a surround sound listening environment. The amplifier automatically detects maximum and net power availability and requirements based on audio content by decoding audio metadata and dynamically adjusts gains to each channel or sets of channels based on content and operational/environmental conditions. A power supply stage provides power to drive a plurality of channels corresponding to speaker feeds to a plurality of speakers. The amplifier has a front panel having an LED array with each LED associated with a respective channel or group of channels of the multi-channel amplifier, and a control unit configured to light the LEDs according to display patterns based on operating status or error conditions of the amplifier.

There is provided a method of operating a device to generate a target sound that is audible to a user of the device, the method comprising measuring background noise in an environment in which the device is located; using a perceptual loudness model to predict an audibility of the target sound to the user of the device based on the measured background noise; using the output of the perceptual loudness model to determine a gain value that is to be applied to a source signal used to generate the target sound in order to provide at least a desired level of audibility of the target sound to the user; applying the determined gain value to the source signal to produce a modified source signal; and generating the target sound using the modified source signal.

Mobile devices may capture audio signals indicative of test audio received by an audio capture device of the mobile device; and send the captured audio and the zone designation to a sound processor to determine equalization settings for speakers of the zone of the venue. An audio filtering device may receive the captured audio signals from the mobile devices; compare each of the captured audio signals with the test signal to determine an associated reliability of each of the captured audio signals; combine the captured audio signals into zone audio data; and transmit the zone audio data and associated reliability to a sound processor configured to determine equalization settings for the zone based on the captured audio signals and the test signal.

Example techniques may involve performing aspects of a spatial calibration. An example implementation may include detecting a trigger condition that initiates calibration of a media playback system including multiple audio drivers that form multiple sound axes, each sound axis corresponding to a respective channel of multi-channel audio content The implementation may also include causing the multiple audio drivers to emit calibration audio that is divided into constituent frames, the multiple sound axes emitting calibration audio during respective slots of each constituent frame. The implementation may further include recording the emitted calibration audio. The implementation may include causing delays for each sound axis of the multiple sound axes to be determined, the determined delay for each sound axis based on the slots of recorded calibration audio corresponding to the sound axes and causing the multiple sound axes to be calibrated.

A microphone system includes a microphone with a microphone output for converting a first acoustic audio signal to a microphone signal, the system including: a head part including a loudspeaker with a loudspeaker input for converting a loudspeaker signal to a second acoustic audio signal; a first connector for connecting the system to an auxiliary device and including a housing and a first terminal; a unit for preprocessing the microphone signal having at least a first input connected to the microphone output, a first output connected to the loudspeaker input, and a second output connected to the first terminal. The unit is configured to: receive the microphone signal on the first input to form a input signal; and process the input signal to form first and second output signals on the first and second outputs, respectively, the first output signal and the second output signal based on the input signal.

In one aspect, a first device includes at least one processor and storage accessible to the at least one processor. The storage includes instructions that may be executable by the processor to receive input from a camera and identify a second device based on the input from the camera. The second device may include at least one speaker and at least one microphone. The instructions may also be executable to identify a current location of the second device within an environment based on the input from the camera and to identify a current location of an object within the environment that is different from the second device. The instructions may then be executable to provide a command to alter operation of the at least one speaker and/or the at least one microphone based on the current location of the second device and the current location of the object.

Embodiments of detecting detects in a playback device via audio playback are provided. A playback device may play a test sound during a time period, and capture, via one or more microphones of the playback device, the test sound during the time period. A determination that a defect in the playback device has been detected may be based on the recorded test sound.

A computing device may transmit playback device configuration information to a given playback device. The computing device may then receive calibration data corresponding to each playback device of a plurality of playback devices, and receive playback device characteristic data indicating at least one playback device characteristic for each playback device of the plurality of playback devices. Based on at least the received calibration data and the received playback device characteristic data, the computing device may determine updated playback device configuration information and transmit data indicating the updated playback device configuration information to the given playback device.