Furthermore, 60 bpm falls perfectly because it is not too fast to be distracting to diminish concentration for intelligence & memory capacity enhancement nor too slow to be a bore to fall asleep. Also 60 is the geometry of the universe according to the pythagorians thus definitively becomes 240 triangles in the 3d plex as an analogy to 60bpm(Beats per minute). In science " The fight or flight response " becomes apparent in the coordinate emotionology to music because as one fears one retracts & as one is angry one charges forth against the enemy thus a connection to combat is discovered. As for the other two which serve more as a psychological stasis when one is happy one ascends in the coordinate plex & as one is sad one descends from the central matrix. :D