Indie duo Mates of State is composed of the husband-and-wife team Kori Gardner (vocals, organ, synthesizer, piano, and guitar) and Jason Hammel (vocals, drum set, glockenspiel, synths, and other percussion). The couple met in their hometown of Lawrence, Kansas (that latest hotbed of indie rock), relocated to the Bay Area for a while, and now resides in New York. Cute as can be, the band is notable for its quirky harmonies and song structures, and the couple’s ability to complement each other while simultaneously working different melodies. Maybe it’s that marriage thing? Mates of State play at the Tralf on Wednesday (August 6), with San Francisco string-metal band Judgement Day. The show starts at 8pm.