EchoAmazon. com Just a few bars into song 1, "Room at the Top," and you know you're in the capable hands of a master songwriter. A mellow chorus wafts by, whispered in Petty's patented Byrdsian drawl, and the song seems to tick tock to a stop. But storming over the top is a riff from guitarist Mike Campbell. Another chorus and you know there's a bridge creeping up. Petty, in a gesture that's both droll and dynamic, mutters "Hit it" to announce it. The