Thank you for the replies. I opened the Television tab in the connected app. I didn’t see a button labeled “switch to TV” or anything. The app showed a moving indicator bar that made me think it was waiting to connect. The volume slider didn’t fill in.
I think my problem is operator error / missing receiver features. When I first plugged it up, I didn’t have a good view of the back of the receiver. I saw an optical audio port and assumed it was an output, but looking more closely, I think it’s an input. And, the red/white audio is an output, but it’s specifically labeled “subwoofer”. So it would output nothing on 2-channel stereo, and even when it did output sound, it probably wouldn’t be appropriate for this use.
That leaves me a few options I see:
1 - I think there is a headphone audio out, standard AUX, on the front of the receiver. That might work.
2 - I could perhaps run the HDMI out into a splitter, and then send the audio to the TV Adapter somehow, and send the video to the TV. The TV set itself doesn’t use the audio (speakers always turned off). But I am not sure what splitter options exist and whether this would create any issues, such as excessive delay between video and audio.
3 - If I can get to it, I can run audio from the TV itself to the box, more or less using the TV as the splitter… But the way the TV is mounted, it may be major surgery to get there, and there’d be a cable dangling down the wall below the TV.
4 - Buy a receiver with better audio output options.
The first option is, of course, the simplest. But would audio quality be decent through a headphone jack? I suppose it’s good enough for headphones, which can sound great … so maybe? I’ll try that soon as I can find the right cables.
Thanks! My father is 80 years old and a good TV watching experience will improve his enjoyment of life.