Libertine soundtrack

The movie, the libertine, starring johnny depp is nothing amazing and the soundtrack isnt anything amazing either. however, there is one standout tracked that caused me to spend $13, just to get that one song. The track was originally created for an anne frank movie by michael nymann. the song was called "if." I havent actually heard the whole version of "if" from that movie, though it sounded mor eor less the same. It has a beautiful female vocals. the song is used at the end of the film. I think its called farwell from rochester. The song is sung in english and latin. I forget what the latin verses mean. I did find them online though. Either way, the song is excellent and it played on repeat for a while. I highly recommend it.