I wonder if setting Loudness Equalization would help? I don't have an RT (yet), but I do have Win8 on a Samsung Slate. I have to set the Loudness Equalization to make the volume loud enough to hear.
3 Ways to Normalize Sound Volume on Your PC - How-To Geek
Can anyone with a Surface RT try this to see if it helps?
3 Ways to Normalize Sound Volume on Your PC - How-To Geek
Can anyone with a Surface RT try this to see if it helps?