And yeah, changing music ye olde basic way involves:
1) Alttab
2) Volume Mixer shortcut
3) Open up the by-program mixer because why the shortcut doesn't go there in the first place idk
4) Mute CoH
5) Open foobar
6) Find track
7) reverse operations later
Which is, yes, like 10 seconds and of absolutely inscrutable complexity. But considering there's a fluid way to change it in-game whilst retaining the menu sounds, and the fact the game has two or three alternative tracks designed for the purpose which bear (imo) much better to looping...
World of Warcraft permits you to bind keys to mute music and sound effects separately. I miss that on many other games.
But I like CoX's sound design so much I'd resent muting it anyway.