Anna Maria Kieffer

Mezzo-soprano vocalist and musicologist born in São Paulo, Brazil. She has a long-standing collaboration with Leo Küpper. Additionally, she has worked with John Cage, Dieter Schnebel, Jesus Villa-Rojo, Jorge Peixinho, Daniel Teruggi, Conrado Silva, Gilberto Mendes, Willi Correa de Oliveira, Jocy de Oliveira, Mario Ficarelli, Vania Dantas Leite, and Vanderlei Lucentini.