For External Sources such as HD Cable Boxes, HD Satellite Boxes, Blu-ray players, DVD players, etc:
It is best to connect the HD Cable Box, HD Satellite Box, Blu-ray player, DVD player, etc. directly to external audio devices such as Home Theaters, Soundbars, AV Receivers, etc.
For information on how to connect them together please refer to the user manuals of the respective devices.Note: You might experience A/V Sync (Lip-sync) issues if you use the above method, in which case you will have to use audio/video lag correction features in your external audio device if they are built-in.