The latest installment in the Red Hot series of benefit CDs, Onda Sonora: Red Hot + Lisbon, rides the Brazilian pop wave. Keeping their feet firmly planted in the sands of tradition and their heads spinning with modernist Tropicalia topspin, the artists of Onda Sonora — including standard-bearers Caetano Veloso and Djavan as well as worthy slummers like k.d. lang and DJs Spooky and Wally — create a rhythm nation whose citizens are encouraged to jump borders.