Direct Audio, I'm cheating on you. I can't help it, the other API's are cross platform. This will never work out with my busy lifestyle. I hope you understand. Goodbye.
The only question at hand is which of the two I should choose. Whilst FMOD has a voluptuous figure and a load of naughty file types, and openAL supports MIDI which I like, is well liked by other. Oh I can't choose, I want both!