In the arts, it is possible for multiple superlatives to exist side by side—for which reason this author hopes it won’t be taken amiss that he considers the concert series “Echo of the Unheard” to be the most important one in Viennese musical life. This series affords an experience of how an entire, fully valid era of music history exists of which Arnold Schönberg, Viktor Ullmann, Erwin Schulhoff, Egon Wellesz, Erich Zeisl, Ursula Mamlok, Vítězslava Kaprálová, Ruth Schönthal, and Marcel Rubin are just a few representatives among the approximately one hundred composers whose works it has included so far.