Want a better night's sleep? Try Mahler's Symphony no. 10. Classical music's been proven to be useful as alternative medicine—studies have tested everything from lowering blood pressure to reducing pain and even making you smarter. So when the Japanese Philharmonic was looking for a way to reach a new audience, they decided to market their music in the form of "pills"—tiny USB files of a song, packaged up with a prescription for whatever's ailing you.