Radio Freefall by Matthew Jarpe

A first novel that shows a certain amount of potential but doesn't really come through on it. The main story is about a rock star who uses a technology to create certain moods in his audience. However, the story ends up with him saving the entire world from tyranny, in a series of not terribly plausible steps. The characters are all supremely great at everything that they try, which gets a little tedious, too.