Novos Baianos formed in 1968, during the height of Brazil's Tropicalia movement, but they came to maturity after that multiarts revolution was on the wane (though it's impossible to imagine the group without the innovations of Caetano Veloso, Os Mutantes, Gilberto Gil, Gal Costa, and Tom Ze). The combo moved between a dazzling hybrid of psychedelic rock and Brazilian roots music with utter grace and nonchalance, as if it were the most natural thing in the world. Novos Baianos made a clutch of classic albums during the first half of the 70s before losing its way, and they remain indelible, vibrant documents of musical ferment bursting with possibility. Today's 12 O'Clock Track is one the group's greatest moments: "Tinindo Trincando" is from the 1972 album Acabou Chorare (Som Livre), a high-powered jam with searing lead guitar slaloming through a driving groove that moves easily between funked-up hard rock and forro. The melody is irresistible, but it's the way singer Baby Consuelo sells it that seals the deal. Check it out below.