Universal Music Group. Assum Preto (Ao Vivo)· Gal CostaGal℗ 1971 Universal Music International. Released on: 1996-01-01. Producer: Roberto Menescal. Associated Performer, Vocalist: Gal Costa. Composer Lyricist: Humberto Cavalcanti Teixeira. Composer Lyricist: Luiz Gonzaga.