Timothy HubbardMusic in general is a fascinating thing;
   scientists have tried to come up with a 'what does all music
   have in common?"; and a lot of things had to be eliminated; the
   idea that it was for humans (animals and plants and I believe
   bacteria also respond to music - I'll have to investigate that
   one further one day). It's not frequencies per se (timbre/pitch
   is a feature of the instrume...nt; but you can have music
   without audible sound; just pressure. Think about subwoofers and
   kickers - or some really deep pipe organ notes that are so deep
   they're just pressure on your chest)"