Per the great advice of you guys, I finally got my PC hooked up to my surround sound system via:
PC GPU Video card --> [HDMI] --> TV --> [optical] --> Soundbar
It sounds phenomenal. There's only one problem - To The Moon skips and stutters!!! I immediately tried all of my summer sale games - Broken Sword 5, The Witcher 2, Final Fantasy VII-VIII, Amnesia, Gone Home - and NONE of them skip or stutter.
However, the least graphically intensive of them all - To the Moon - skips! This is the worst, because the music is so darned good!
Does anyone have any idea why this would be happening with this game alone?