Hop Along began as songwriter Frances Quinlan's solo acoustic project, but has since evolved to a full band signed to the Saddle Creek indie label. The Philadelphia quartet self-produced its third album, "Bark Your Head Off, Dog," which features an eclectic sound influenced by folk, pop, punk and classical music. But it's Quinlan's effervescent vocal delivery of her thoughtful lyrics that might be the band's most remarkable element. Hop Along stopped by the CPR Performance Studio before headlining the Bluebird Theater in Denver last week. The band played three songs from "Bark Your Head Off, Dog" and Quinlan spoke with Jeremy Petersen about adding a cinematic quality to her music, the legacy of Saddle Creek's catalog and what it's like collaborating with her brother Mark, who plays drums in Hop Along.