On Shakey Graves new song "The Perfect Parts," Austin-based musician Alejandro Rose-Garcia turns up the amps for a blues-driven style of guitar playing that would satiate fans of the Black Keys and Gary Clark, Jr. "It's the aggressive peak," he says of where the song fits into his new album "And the War Came."

That said, the song's been a long time coming. Rose-Garcia says he wrote the melody in high school, but the story within is something more recent. "I was spending a lot of time ogling...