maybe i'll try posting an abbreviated response:
edit: I sorted the problem out, what you're seeing here is the full response.
hmm interesting, it took me a while to find it, the song is hidden in a different folder to the main music list in the sound editor.
Anyway, you can find it in Sound\Music\mp3Music\ and the filename is "PH1.mp3" .
Ok, just before I answer the arthas question, let me set it up by reinforcing that rockin arthas is a destructible doodad.
If you want Arthas to generate a 3d sound, you must first s-elect the sound in the sound editor and right-click and s-elect "use as sound". Then double-click on the sound where it appears on the right-side and make sure "3d sound" is checked.
Then when you go to play the sound, just use the action "sound - play sound at point". i.e.
Sound - Play PH1 at 100.00% volume, located at (Position of Rockin Arthas 0000) with Z offset 0.00
where the parameter (Position of Rockin Arthas 0000) is used from the function "destructible - position of destructible" (click on the parameter and you will find it in the list in the window that pops up.