But Chopin was a composer. He did have something to do with music. =P

As for sidequests, I guess you could consider the Score Pieces a sidequest all by itself. I mean, you have to do that "sidequests" if you went Retto's Silver Star and Polka's Gold Moon. But at least they had a bonus dungeon like most RPG's.

Something little that disappointed me, however, was the fact that you couldn't rotate the camera. Most of the places there were absolutely beautiful, such as the Xylophone Tower, and it was a shame I couldn't have looked around it with more detail.