I wonder if Hifiberry OS can decode aptx audio? I can see that bluez-alsa is used by the OS (as with rasbian). The readme file of the bluez-alsa repo states that one of the dependencies is openaptx (same code as used to decode aptx by pulseaudio). So, the question is if bluez-alsa used by the OS has been configured with libopenaptx and the aptx codecs? If no...why? Are there any legal issues?