Samba, Afro-Cuban jazz, or was it bossa nova? No sooner has the infectious mix of styles of Brazilian music begun its whirlwind around your ears than you start to lose your grip on the terminology. The Afro Samba, yet another Brazilian variant, which the singer Jorge Ben established during the rhythmic merry-go-round of the ‘60s and ‘70s, completes the cycle of confusion. Yet those who have heard “Mas Que Nada,” that huge hit for which artists such as Sergio Mendes and Dizzy Gillespie have recorded cover versions, will know the man behind this album, at least by name. Ben’s compositions and arrangements can only be compared to those of Jobim or Mendes in a rudimentary sense.