"Home Theater" setups in the 80's were purely analog, and the VCR was the hub. You connected your coaxial to a VCR...connected analog cables from the VCR to the TV...analog cables from the VCR to a stereo receiver....receiver to speakers...and listened to 2-channel stereo from bigger speakers. The only thing digital was the CD player but it converted its audio to analog before outputting to the receiver. You're trying to put a digital device in an analog setup. It'll only work if something has an analog-to-digital convertor.
Ok, I get it--what an education I'm getting! i do have an old DVD/VCR that, until recently, was working--but a power surge ruined it last year. However, I also have and use a 90s receiver--I have it hooked up to a turntable and CD player (plus a Bluetooth adapter). So, what if I try this:
Run a coax cable out of the mini box into a splitter--then send one coax to the TV, and send the other to my receiver. I would need a coax-to-RCA cable, right? And then play the TV through my stereo speakers...?
Btw, my mini box audio "settings" only mention volume control--nothing else...