I have a Samsung Smart TV and a Yamaha home theater system. They are connected by HDMI and an optical cable. I can play a movie from a streaming service selected on the TV (HBO, Netflix, etc) through the TV/Home Theater just fine. My problem is I often need to play the audio output through my Bragi bluetooth ear buds to avoid disturbing my mother-in-law who lives above the AV room. When I connect the optical feed directly to my bluetooth transmitter and use the built in app on the TV for the movie source, I have no sound at all in the bluetooth headset even though the TV menu says the output is going to the optical cable. There is a signal there but it has no volume. How do I solve this issue so that I have controllable volume in my ear buds? My bluetooth transmitter has optical in and out and mini-RCA in and out but my TV only has optical out and my Yamaha only has optical in. Do they make an amplifier that I could put in the optical line between the TV and bluetooth transmitter to control the bluetooth volume? Is there another way?