Krenek, Ernst. (1900–1991) Autograph Musical Quotation from the First Completely 12-tone Opera, "Karl V."Autograph Musical quotation of 12 tones, signed "Ernst Krenek," with the original transmissal envelope postmarked 1978. 9. 7 x 14. 7 cm manuscript paper, mounted to card. "Karl V (1933) is emblematic of the difficulties Krenek faced both as an individualist in an era of stultifying ideologies and as a champion of modernist compositional techniques. Although the work was commissioned by the Vienna State Opera, the 1934 premiere was cancelled, the