Carnivale Intrigue by Kevin MacLeod
Is it a samba? Probably. It also depends on how broadly you define a samba. Percussion comes in heavy later in the piece with a pile of street drummers for a thicker feel. I'm having a hard time describing the exact groove of this piece. "Slightly whiter than average samba"? You can download this in uncompressed format here. Download comes with individual tracks so you can make your own mixes.