Magic Music Visuals

How do the midi notes trigger the motion ?- and what is used for the sound generator ? I have the midi set with my own instruments so does that mean that I can provide a 2tk master audio (not midi but mp3 or wave) and then have multiple audio tracks for the separate midi tracks ( like piano or bass)...

I'm looking for expert sync via midi or wave -to lock with visualizer backgrounds (co-authored) but then layered with very specific added text (words spelled out a syllables to match specific beats) or shapes that move and sound exactly to the melodic lines - This could hopefully blossom into a coll...