The Samsung TV model "UE55DU7172UXXH" supports HDMI ARC.

- HDMI ARC makes it possible to send the audio signal from the TV to an external audio device, such as a soundbar or receiver, via a single HDMI cable without the need for an additional optical or audio cable.

It is important that the corresponding HDMI port on the TV that is designed for ARC is used and that the ARC function is activated in the TV settings.