I personally have used quite a few audio modules in some of my past projects. There are quite a few audio libraries out there that will enable you to very easily play back these files, with a considerable amount of control over the process. You don't actually *need* to learn the format, as long as you have the audio-modules you alread need (there are quite a few good trackers for modules. If you would like a list of some of my favorites, just reply =) ).
Consider using Bass (http://www.un4seen.com/bass.html)
It has very accurate playback, and is rather simple to use.
Fmod(http://www.un4seen.com/bass.html) also is rather popular, and has a larger user base, but doesn't play modules "perfectly" =)
There are a few other decent ones (mpp sdk comes to mind), but they arn't nearly as widespread.
Anyways, hope this helps.