I'm using a Retrotink 2x so im not directly plugging into the TV. I think i found out the issue. The pins on the cable are bent. :(
Yeah. I've been there before…several times….in fact, my HD Retrovision Saturn adapter is currently missing one of the audio pins.
I cannot stand those 9-pin DIN connectors. Absolute trash-tier input. Wish the standard could've been something more like the Nintendo inputs of the time.
If you're incredibly careful, you may be able to salvage it with thin needle nose pliers. But, too much movement will snap the pin off entirely, so it's a tricky situation. If you do manage to salvage it, I would never remove the adapter from it again, unfortunately.
Still doesn't quite explain the sound issue, though…?