So the famous quote "All Music is folk music, I never heard no horse sing no song" no longer applies.
We now have TWO types of music: Folk Music, & Whale music.
Of course I've wondered about that quote for some time.
While I've never heard a horse singing, I've heard larks, thrushes & blackbirds produce sounds that sure sounded like music to me.
So that's decided then, THREE types of music, Folk Music, Whale Music, & Bird music. Of course there may be others, such as choirs of Angels, or Faerie Music, but I haven't heard them myself.