sentences:  Edelstein stayed in Buenos Aires and it was paradoxically only many years later in 1979, that he connected with Francisco Kröpfl, considered the best disciple of Paz.With him he finally completed his study of composition by being given the most important tool – the mastery and control of pitch.This completed Edelstein's appreciation of the universe of Arnold Schoenberg and the Second Vienna School − a world which Paz had introduced to Spanish speaking countries.