I have just completed my translation of the MPPSDK API. Anyone interested in a copy please email me at firstname.lastname@example.org and I will email it to you. I put some extra time into documenting it so you won't be wading through the dark when using it.
It is an excellent playback engine and it is 100% free for use. Yes, I said FREE. No bloody fees, licences, clauses or conditions for Freeware, Shareware and/or Commecial. Notta! You can make a WMD with it for all I care. The API was made by Oliver and he said it is 100% without condition, free. Beat that BASS/FMOD.