Here are some interesting radio programs on Sao Paulo's Cutural FM - listen here on the Internet. Times are local Sao Paulo times, one hour ahead of EDT.
August 15: Cristina Ortiz plays the important piano part in Bachianas Brasileiras #3, with Vladimir Ashkenazy conducting the New Philharmonia Orchestra. Bonus solo pieces: A lenda do caboclo and Alma Brasileira (Choros #5).
August 19, 4 a.m.: The music for violin and piano isn't well known - the Sonata Fantasia no. 2 is an impressive work. This performance is by Claudio Cruz, violin, and Nahim Marun, piano, from a Brazilian CD that's not easily available in North America or Europe.
At 11:00 a.m. the same day, the program is "Ciranda - Academia brasileira da música," which includes some very interesting Brazilian music. Camargo Guarnieri's 3rd Symphony is played by the Orquestra Sinfônica do Estado de São Paulo, conducted by Johh Neschling. Next is a piece by the Villa-Lobos scholar turned composer Richard Tacuchian entitled Impulsos. Finally, Cristina Ortiz plays Impressões seresteiras from Villa-Lobos's Brazilian Cycle.
August 22, 11:00 a.m.: Pianist Martha Marchena performs the short but interesting Três Marias, and Cristina Ortiz plays A prole do bebê (I presume that's the first suite).