twooffour said:

Nah, I think there was some kind of high-pitched G-string... err... strings playing a high G or something?
I remember it because when the lightsabers light up, they start buzzing at the same note... although it'd be funny if I remembered it wrong :D

But yea, the lack of loud music is better for the suspense, as well :)

Actually, those were synthetic strings, added by the editors/sound designers, much like the choir in AOTC's "Knowledge of the Force"/"Yoda vs. Dooku"/'Yoda Strikes Back"