A system comprising: a first audio device (100a;302); and a second audio device (100b;304); wherein processors in the first and second audio devices are configured to: cause the first audio device to exchange first control signals with a source device (900;306) and thereby to receive first audio signals from the source device, and cause the second audio device to exchange second control signals with the first audio device and thereby to receive the first audio signals from the source device; the first control signals comprising communications using Bluetooth BR/EDR protocols and establishing a first Bluetooth link (915;310) for audio streaming from the source device to the first audio device, and the second control signals comprising communications using Bluetooth Low Energy (BLE) protocols and transferring to the second audio device parameters of the first Bluetooth link, such that the second audio device can receive and decode an audio stream transmitted from the source device to the first audio device over the first Bluetooth link, wherein the source device comprises a processor and a user interface, the source device processor being configured to execute a first application causing the source device to display a user interface allowing a user of the source device to control which second audio device among a plurality of potential receiving devices (402;404;406) the first audio device exchanges the second control signals with, the potential receiving devices being displayed by the first application on the user interface based on information received from the first audio device, and being configured via the first audio device, while the source device is not itself aware of the potential receiving devices. a first audio device (100a;302); and a second audio device (100b;304); wherein processors in the first and second audio devices are configured to: cause the first audio device to exchange first control signals with a source device (900;306) and thereby to receive first audio signals from the source device, and cause the second audio device to exchange second control signals with the first audio device and thereby to receive the first audio signals from the source device; cause the first audio device to exchange first control signals with a source device (900;306) and thereby to receive first audio signals from the source device, and cause the second audio device to exchange second control signals with the first audio device and thereby to receive the first audio signals from the source device; the first control signals comprising communications using Bluetooth BR/EDR protocols and establishing a first Bluetooth link (915;310) for audio streaming from the source device to the first audio device, and the second control signals comprising communications using Bluetooth Low Energy (BLE) protocols and transferring to the second audio device parameters of the first Bluetooth link, such that the second audio device can receive and decode an audio stream transmitted from the source device to the first audio device over the first Bluetooth link, wherein the source device comprises a processor and a user interface, the source device processor being configured to execute a first application causing the source device to display a user interface allowing a user of the source device to control which second audio device among a plurality of potential receiving devices (402;404;406) the first audio device exchanges the second control signals with, the potential receiving devices being displayed by the first application on the user interface based on information received from the first audio device, and being configured via the first audio device, while the source device is not itself aware of the potential receiving devices. <EOS>