So it seems you can stream on FMOD by doing something like
system.createStream() // with parameters string name_or_data, MODE mode, ref CREATESOUNDEXINFO exinfo, ref Sound sound)
But then I see there is a music system
MusicSystem musicSystem = null;
_eventSystem.getMusicSystem(ref musicSystem);
musicSystem.loadSoundData(...)
What is the better approach and why? I am using FMOD from C#