I switched from directTV on Thursday and although I have received a 100X improvement in network bandwidth my audio from the optical port to my sound bar is extremely low. I looked at a few other threads but nothing addressing a fix
are you using a projector TV or similar? Optical is normally not needed since the mid-90s. how is the set top box connected to your equipment? does the TV and sound bar each have an ARC (audio return channel labelled HDMI) connector?