Haih or Amortecedor is the ninth studio album by the Brazilian rock band Os Mutantes, their first studio album since Tudo Foi Feito Pelo Sol in 1974 and the first one of new material since Mutantes Ao Vivo in 1976. Following the band's 2006 reunion at London's Barbican Theatre, Mutantes founder Sergio Dias commenced work on Mutantes' first studio album in 35 years. Dias collaborated with Tom Zé and Jorge Ben (who wrote the band's original hit "A Minha Menina"). — Sergio Dias, May 2009 The word "haih" means "crow" in the Shoshone language. "Amortecedor" means "shock absorber" in Portuguese.