If I know, it is not about HDMI-ARC, but HDMI-CEC and implementation of bi-directionall communication. So, not only turn off command from audio receiver to TV can be sent, but pause too (and then is on HDMI/TV target device, what happen). It is same as TV send to audio device command to turn off, only opposite direction. In Wiim settings I can see CEC suport, so CEC is supported (but don't know, on which level). If I understand, now is only question, what commands can be supported. If I know, this is common function in CEC devices, maybe not pause, but turn off deffinitly.