Certain Konami titles (and select others) use .BIN files as their method of music storage to which PSF Central has a wonderful little proggy called VB2RIP which extracts .wav information from .BIN files.
You can obtain the file from Neill Corlett's site -
VB2rip - Neill Corlett's Home Page
Despite the main page only listing a few titles, many are actually supported. Worked fine when I wanted to get the soundtrack from the BIN files on my Castlevania: Curse of Darkness PS2.
EDIT: And before the fanboys go for the jugular, I am well aware DMC3 is a Capcom title.