Sound & Gravity festival: Breaking down year two with creator Mike Reed

There's only one way to sum up the eclectic range of acts appearing at the Sound & Gravity Festival this weekend, a lineup that includes electro rockers Son Lux, ambient master Grouper and avant-jazz ensemble Natural Information Society. “The band has either played at Constellation or should have,” said festival creator Mike Reed. The boutique venue, 3111 N. Western Ave., is where Reed books a mix of modern jazz, contemporary classical and experimental acts year-round. And it’s one of the seven…