Scarth makes music that sounds like Postal Service in a blender with They Might Be Giants, poured into a glass with a shot of Beck. He’s out to prove that an earnest heart can live side-by-side with a sense of humor. He plays live with Dr. Groove and a tamborine, and a guitar, and a kazoo sometimes. He looks like a singer-songwriter, but he sounds like a rock and roll band who have jointly possessed a single body.