Glass Shatterers! Erna Sack sits on two High Fs in a lively song

Erna Sack sings Frühlingsstimmen (Voice of Spring) by Johann Strauss Glass Shatterers! Erna Sack - J. Strauss II: Voices of Spring, 1937 Live, High F6, G6, B6 Erna Sack - Voices of Spring Erna Sack - Voix du printemps The Amazing Erna Sack! Voices of Spring ! Johann Strauss Beautiful Sound HD Titonut 2018 (LIVE) Erna Sack - Voices of Spring Waltz (Frühlingsstimmen) • B6 staccato and high F#6 Opera Series - Erna Sack in Nanon (1938) - Film Vocal Range (A3-C7) Ingeborg Hallstein sings Frühlingsstimmen Walzer (Voices of Spring Waltz) by Johann Strauss II (RARE) Erna Sack - Una Voce Poco Fa (in German) with High Bb6 & G#6 - 1936 Erna Sack \"Die Deutsche Nachtigall\" Folge 2 Martha Eggerth,Voices of Spring Erna Sack sings Kaiserwalzer(Emperor Waltz) VOICES OF SPRING by Erna Sack Erna Sack - Nanon Erna Sack sings Draußen in Sievering by Johann Strauss. Erna Sack sings \"Ay, Ay, Ay\", Serenade by Perez Freire