Fmod has a music system - parameter based "cue < theme < file" type graphical layout. Almost Unreal Editor / fancy MaxMSP style setup thats geared strictly for interactive music.
However, they also have another way of implementing music through the event editor. I've seen people straight up create multi-track events with individual files referenced and manipulating the playhead of the music with parameters -
Again, using the event editor - dragging in a multi-channel file (say a 10 channel - 5 stereo files), baked with audacity or another software, that simply crossfades between sets of channels using 1 parameter.
My question is:
When do you use the interactive music player built into Fmod, and when do you use the event editor for implementing music? What are the system resource advantages/disadvantages of using either/or?