In embodiments of an audio control module (318), audio data (310) is received from an audio data source (314) for output to an audio rendering device (316). An initialization input (326) can be received from a wireless audio headset (320) and, responsive to receiving the initialization input, the audio data (328) is communicated to the audio headset. The audio that would be generated from the audio data (322) at the audio rendering device (316) is also limited, such as by replacing the audio data (322) with null audio data, clearing audio data packets from the audio data (322), or by asserting a mute signal (336) to the audio rendering device.

An electronic device includes a six-sided glass enclosure defining an interior volume and comprising a first glass member and a second glass member. The first glass member defines at least a portion of a first major side of the six-sided glass enclosure, at least a portion of a peripheral side of the six-sided glass enclosure, a first region along the peripheral side and having a first thickness, and a second region along the peripheral side and having a second thickness different from the first thickness. The second glass member is attached to the first glass member and defines at least a portion of a second major side of the six-sided glass enclosure. The electronic device further includes a touchscreen display within the interior volume and positioned adjacent at least a portion of each of the six sides of the six-sided glass enclosure.

An apparatus and method for determining signals representative of events in the environment of a reactive transducer while being driven by a switching amplifier is disclosed. While the switching amplifier is in a zero voltage state, a signal capture circuit that is also in a zero voltage state is connected to the transducer for a relatively brief period of time during which a measurement is made of the residual current flow due to the inductance of the transducer. A prediction of the output signal is then subtracted from the signal measured across the transducer, reducing the overall range of the signal and increasing the relative size of the back-EMF signal compared to any remaining output signal. If desired, conventional echo cancellation can then be performed. The back-EMF signal can then be subjected to further processing by an analog-to-digital converter as known in the art.

Vehicles and sound systems for vehicles are provided. In one example, the sound system includes a plurality of sound producing devices. An amplifier is in communication with the sound producing devices. The amplifier is configured to receive input channels of audio content, to map the input channels with output channels to the sound producing devices in one of stereo mode and surround sound mode, and to remap the input channels with the output channels to the sound producing devices in the other of the stereo mode and the surround sound mode.

In embodiments of an audio control module (318), audio data (310) is received from an audio data source (314) for output to an audio rendering device (316). An initialization input (326) can be received from a wireless audio headset (320) and, responsive to receiving the initialization input, the audio data (328) is communicated to the audio headset. The audio that would be generated from the audio data (322) at the audio rendering device (316) is also limited, such as by replacing the audio data (322) with null audio data, clearing audio data packets from the audio data (322), or by asserting a mute signal (336) to the audio rendering device.

Embodiments of a configurable loudspeaker using a user orientable routing card that allows for multiple electrical drive modes in a non-powered loudspeaker system. The speaker has one or more drivers mounted in enclosure, an audio input interface configured to be coupled to an audio source through one or more amplifiers, and a connector interface configured to receive a routing card. The routing card is configured to be inserted in a first orientation to connect the audio input interface in a first operating mode with respect to driver selection and connection to the one or more amplifiers, and a second orientation to connect the audio input interface in a second operating mode with respect to driver selection and connection to the one or more amplifiers.

An audio control system includes a BLUETOOTH headset, a first electronic device, and a second electronic device. The first electronic device sends a first media audio stream to the BLUETOOTH headset in response to a first operation of a user. The BLUETOOTH headset receives the first media audio stream from the first electronic device, and outputs the first media audio stream. The second electronic device outputs, in response to a second operation of the user, a second media audio stream through a first preset channel other than the BLUETOOTH headset. When the BLUETOOTH headset receives the first operation of the user, it performs one of the following actions: interrupting the second BLUETOOTH connection between the BLUETOOTH headset and the second electronic device or sending a first message to the second electronic device indicating that the BLUETOOTH headset is occupied.

The present disclosure provides a playing device and a playing method based on the playing device. The playing device includes a headphone interface circuit and a speaker circuit. Signal input terminals of the headphone interface circuit and the speaker circuit are directly connected to a sound source output terminal of the playing device. The signal input terminal of the speaker circuit is connected to a first enable signal output terminal when the first enable signal output terminal outputs a matched enable signal, a sound source signal output from the sound source output terminal is played by the speaker circuit. The signal input terminal of the headphone interface circuit is connected to a second enable signal output terminal. When a headphone is inserted and the second enable signal output terminal outputs a matched enable signal, a sound source signal output from the sound source output terminal is played by the headphone.

An audio service module is communicatively connected to an audio abstraction module. The audio abstraction module is communicatively connected to a codec driver. The codec driver is communicatively connected to a codec chip. The audio service module receives a headset insertion/removal message and sends the message to the audio abstraction module. The audio abstraction module determines a digital-to-analog converter DAC channel configuration policy in the codec chip based on the headset insertion/removal message, and sends the DAC channel configuration policy to the codec driver. A DAC channel is used to transmit earpiece or headset data, and transmit motor data to a class-D amplifier to drive the motor. The codec driver controls the codec chip to reconfigure the DAC channel based on the DAC channel configuration policy.

Synchronized output of audio on a group of devices can comprise sending audio data from an audio distribution master device to one or more slave devices in the group. Scores can be assigned to respective audio playback devices, the scores being indicative of a performance level of the respective audio playback devices acting as a master device. The device with the highest score is designated as a candidate master device and one or more remaining devices are designated as a candidate slave(s). A throughput test is conducted with the highest scoring device acting as the candidate master device. The results of the throughput test are used to determine a master device for a group of devices. Latency of the throughput test can be reduced by using a prescribed time period for completion of the throughput test, and/or by selecting a first group configuration to passes the throughput test.