The initial collaboration between composer Marcelo Delgado and Emilio García Wehbi, Sin Voces (No voices) marks the foundation of what will become an over-a-decade long close teamwork in the field of opera or music theater. A conceptual alien status to the genre -neither opera nor theater-, an entangling dialogue between musical composition and staging, and the breaking of traditional codes, have allowed the duo to develop differently natured stagings, but all sharing the same premises. In Sin Voices, singers don’t sing and actors don’t act. Both singers and actors offer their bodies and voices to a kind of blasphemous biblical ritual to recover fragments of the lost memory of a cannibal society, one that has been endlessly gobbling itself up throughout history. Two crossing stories, those of Cain and Abel, but crossed to a degree where it becomes that of Abin and Cael. Metaphors of Argentine history and its factions, never hesitating to sacrifice the other and themselves, generation after generation.