I am soo dumb. I needed all line ins to go up, and it fixed them all at once.
I used +13 to match the coax cable input. It seems like this has raised the volume on the QAM input, but I can play around with tuner and input to try and balance them since I did not see a QAM option. For now it is definitely usable.
It would be nice to see an application like irconfig to set these in a GUI, but the reboot need might limit the usefulness.