Well, if you must know my thoughts...
Harmonics will be about an intergalactic battle, demonstrating the dichotomy of good and evil, utilizing the administration of magic through a system of sound waves that travel through space and time, and ultimately threaten to destroy civilizations on other planetary systems.
No, well, I'll try this one...
Harmonics will be about regulators who control a harem of high school girls in order to try to obtain perfect pitch. However, their plans to unify the world through music are disrupted by a dastardly people who are hell bent on preserving the corrupted form of music used to advance war.
Yeah, I'm not feeling that one either, give me one more try, how about this...
Harmonics will be about a person in a world who is given a deific ability to understand the perfect spacing between wave forms thus obtaining the power to use this freqeuncy in order to vibrate molecules on an atomic level and therefore create an energy form of magic from the entropy of all living matter, and thereby controlling the universe.
That's all I've got, sorry, I give up...