User blog comment:General MGD 109/Is there any magic?/@comment-1966944-20120414083309/@comment-1966944-20120415000430

These creatures would not be "sprouting feathers,claws, teeth, etc.," in a matter of seconds because whatever their Wesen species may be they are in their natural state. The human form is their deception and if the Wesen is, as I have previously speculated, a genetic mutation of the human species thorough what is called in evolution "Speciation" then they would have human DNA and not a "loose" genetic code and thus their life expectancy would not be affected.

Music is nothing more than variations in frequency reproduced in some sequential order. Wesen possibly having both human and animal DNA would have the best of both worlds. They would have the ability to understand what frequencies would have what affect on what creatures, then have the human intelligence to reproduce those frequencies, in this case with musical instruments. It has been scientifically proven that sound frequencies can affect the neuro-electric and neuro-chemistry of the brain and as a result can affect the behavior of all living creatures. This is not Sci-Fi but Sci-Fact.

Finally, you are absolutely wrong that some things you just have to expect can only be explained as supernatural. It is only supernatural if you don't know or understand the science behind it.