In my RV, I have a media player that does HDMI out for the TV. Nothing fancy. I'm looking for a simple plug in HDMI and have the output leveled. I so tired of holding the TV remote turning up and down the volume through the entire movie. This is a cheap TV and just need a simple HDMI input and output to level the sound. I have found devices that do it on headphones jacks or rca , but not HDMI. Any shuch devices for about $100?