I doubt anybody has any objections against the current background themes played in game while flying through space. That said, however, there are situations where it feels inappropriate. I propose that different celestial bodies have different sound tracks played while on them. For example, Eve is a hellish world meant to be similar to Venus- a place hot enough to melt iron, and where acid is in the very atmosphere. However, the same cool, calming space music plays when on it; killing the mood. What if instead, upon entering the atmosphere of Eve, the music stopped, and then was replaced by a foreboding, Vulcan tune. This would complete the mood, and add a great deal of atmosphere to KSP. It wouldn't take much to do, a few tracks per celestial body should do, and you could easily get away with applying the same tracks to some over the more minor bodies. (for example, one could get away with having the same material play on Ike and perhaps some of Jool's rocky moons.) I just think it would be a simple thing that would improve the KSP experience. Any thoughts?