It's likely that American audiences first discovered Seu Jorge through his pivotal role as ''Knockout Ned" in the extraordinary, Academy Award-nominated film ''City of God" in 2002. He was later recognized as the seaman with a penchant for singing samba-tinged versions of David Bowie songs in Portuguese in Wes Anderson's comedy ''The Life Aquatic With Steve Zissou." Yet before he was a noted actor, Jorge was an acclaimed singer in Brazil, hailed by such luminaries as Caetano Veloso. On the strength of his stunning new album, ''Cru," he'll make his Boston debut, performing his charismatic, raw-boned blend of bossa nova and rock songs. Sept. 14, Remis Auditorium at the Museum of Fine Arts, 7:30 p.m.