What is that bit of dramatic music that often accompanies battle scenes in trailers when the movie's soundtrack isn't ready yet? It's a big chorus singing in what I think is Latin, and the music builds: "Bom-bom-bom-bom. Bom-bom-bom-bom. Bom-bom-bom-BOM-BOM-bom bom," and so on.
Yeah, I know, not really helpful. I think it may have been used in a very early LotR trailer, but I could be wrong.
Thank goodness for cris and streamweaver. That was driving me nuts. (It's "O Fortuna" from Carmina Burana.)