electrification of the pop and rock music, with a universal, but Brazilian proposal. Some musicians from this group are: Milton Nascimento, Lô Borges, Toninho Horta, Beto Guedes, Novelli, Nelson Angelo, Tavinho Moura and the band Som Imaginário. 1970s The 1970s started with the progressive rock, the hard rock and glam rock, but is the period of the construction of the mutual interference between Brazilian pop music, MPB and rock. Rita Lee (former Mutantes vocalist) started her own work with her band Tutti Frutti, with glam rock-like aesthetics. Other bands from this period include Casa das Máquinas with its music between glam-hard-rock and progressive, Patrulha do Espaço (also formed by a former Mutantes member, Arnaldo Baptista) between progressive and Hard rock, Made in Brazil with its hard rock (but in some songs already with the minimal characteristic of punk rock), the pure hard rock of Bixo da Seda, Edy Star, with his pure glam rock and the proto metal band O Peso. There were many progressive rock bands in Brazil, such as O Terço, Mutantes (without Rita Lee), A Bolha (Hard rock with Progressive mix), Módulo 1000, A Barca do Sol which made the remarkable album with Olivia Byington Corra o Risco, Som Nosso de Cada Dia, Bixo da Seda, Vímana (in which Lulu Santos and Lobão started their musical careers), Moto Perpétuo and Bacamarte, some of which have been very well known in Europe and the US by progressive fans. The progressive rock band Som Imaginário had an experimental characteristic: jazz, bossa nova, contemporary music, impressionist music with the traditional folk and baroque from State of Minas Gerais resulting in a kind of a Brazilian art rock version, and with renowned musicians: Wagner Tiso, Zé Rodrix, Tavito, Luiz Alves, Frederyko. Lula Côrtes and Zé Ramalho with their album Paêbirú that was originally released in 1975 (see 1975 in music), despite representing very well the Brazilian psychedelic movement of the 1960s and 1970s, it can be also considered like an experimental mix of progressive rock and Brazilian northeast folk music certainly. Another band with the only album, but today considered a classic of Brazilian rock is Karma with the work of the same name released in 1972: a forceful melodic Brazilian folk music with a vocal that remember The Byrds, and a bit of progressive rock and jazz, consistent orchestral arranges, and the famous Jorge Amiden's tritarra (a guitar with three