Amy’s music jumps genres as a mix of rock ‘n’ roll, jazz and bluesy balladry. She doesn’t like categorizing it anyhow, and feels boxed in even by the notion. As in ‘Killing Him,’ she sometimes lets the specter of death or consequences of murder inform her thoughts on love. (These days, she’s shaping what you might call a Civil War post-murder ballad.) But the uneven intersections in her work explain why she makes her home at the musical crossroads of Memphis.