Abstract: The Bluetooth device (DEV) controlling a plurality of wireless audio devices, comprises: a wireless communication circuit, to receive a wireless audio device identifier from each wireless audio device; a sound processing circuit to apply independent audio effects on a main audio stream such that the sound processing circuit outputs as many modified audio streams as the wireless communication circuit has received identifiers of wireless audio devices, on the basis of the characteristics of each wireless audio device; an allocation circuit to allocate each modified audio stream to a respective wireless audio device, a transmission circuit to wirelessly transmit through a Bluetooth usage each modified audio stream to said respective wireless audio device for emission by the wireless audio devices.