Brazilian psych-rockers Os Mutantes re-emerged from relative obscurity to headline the 2006 Pitchfork Music Festival, and the gig (along with the rest of the tour) must have inspired the group, because it continued playing and released its first album in 35 years, Haih Oh Amortecedor, earlier this month. The small space of Subterranean is sure to be filled with trippy goodness. (Ben Rubenstein)
