I am in the process of trying to create a basic audio engine that will allow for sound effects and music loops to be played. In order for the engine to function correctly on the Xbox 360 Arcade, do I need to do it using the XAct method or can I just do it using the SoundEffect type variable that is in the XNA framework. From what I have seen, the XAct method includes using a variable called AudioEngine and then plays sound effects using a Cue type variable. Just wondering if one of these is mandatory for the Xbox as I would hate to make something and then find out it only works on a windows version of the build. Thanks in advance.

Either method is viable. I have used both. It really depends on what you are doing, but using Xact worked out well for most everything.