Sufjan Stevens is a restless man. Weeks after dropping the All Delighted People EP, Stevens returns with The Age of Adz, which conjures a peyote ritual with Aphex Twin and the Mormon Tabernacle Choir. It’s a semiconcept record, using work by the artist Royal Robertson as a springboard for music that evokes a visionary psyche. Amid the storm of electronics, brass and spirit voices, melodies surface. On “Impossible Soul,” Stevens rocks an Auto-Tuned falsetto; elsewhere, he chants, “I’m not fucking around!” Be assured: He’s not.