There is a certain kind of mid- to late-summer day that is characterized by hazy sunshine, warm, languid breezes that seem to carry a whiff of the salty sea and cool, mellow music playing somewhere in the background on a radio. That music has got to be "Tanto Tempo," the official soundtrack of lazy summer afternoons. Bebel Gilberto brings a somewhat more modern sensibility to the samba sounds of her legendary father, Joao Gilberto, but she is no heretic. "Tanto Tempo" is not a tricked up, "pop-ified" version of Brazilian music. It's authentic. But this is the sound of the new samba generation, and it's as bracing and refreshing as a cocktail on the beach. Put this disc on when you have friends over for a summer picnic or an evening martini mixer. I guarantee that by the time the evening is over everyone will have asked you "who is this on the stereo?" and you will have helped Bebel sell a few more copies of this terrific work.