a survivor from warsaw alban berg aria aria di sorbetto arioso arnold schoenberg bel canto breeches role burletta cabaletta cadenza cantabile castrato cavatina chest voice claque coloratura comprimario convenienze coup de glotte da capo aria diva fach falsetto fioritura german language gesamtkunstwerk gurre-lieder head voice intermezzo kurt weill legato leitmotif libretto literaturoper lotte lenya mad scene maestro melodrama melodramma messa di voce monodrama moses und aron musical notation opera opera house passaggio pierre boulez pierrot lunaire portamento prima donna prompter rapping recitative regietheater romantic music second viennese school singing sitzprobe spinto spoken word squillo stagione surtitles talking blues tessitura the threepenny opera timbre vibrato wozzeck