Even if there is some set of sounds which some species of animal is
capable of responding to in the same way that we humans respond to the
set of sounds that we call music, it may not be the same set of sounds.
In other words, "animal music" may be different from human music, and if
so, it will be different for each species of animal. Furthermore, human
music is distinct from normal human communication sounds (i.e. speech
and a few other things), so animal music is also likely to be distinct
from normal animal communication sounds. Finally, human music is very
difficult even for humans to compose, so we might suppose that animal
music is difficult to compose, and, non-human animals being generally
less talented in intellectual fields than humans, it is entirely
possible that no animal has ever composed a single item of animal music.