Help me find this Impossible Song!?

Question

I've been searching for this song for ages but it seems impossible to find.
This is the best description i can give from the snippet i heard:
It's a sad song, and sounds as if it may not have any words. There's this woman singing in kind of an operatic voice, but not with as much energy you'd expect to hear in an opera.
If you hear it it just sounds like hopelessness, but it is powerful and moving.
It's one of those songs that you've probably heard but you wouldn't know the name of the song. It's more like a backdrop song.
I've been trying to look for a video on YouTube that uses the song but i still can't find anything.

I hope you can make sense of my description and any suggestions would be cool :)

Thanks

Carmina Burana- thanks, you're on the right tracks. It's given me a lead: it's a song you've definitely heard, but wouldn't know the name of.

Answer 1

Wow, that's difficult!

Carmina Burana?

Answer 2

sounds impossible to find but good luck !