For 10 points, name this opera based on a Buchner play, a work of Alban Berg.
The title character of this work sings ‘Der Mensch ist ein Abgrund.' The 12 note theme of a passacaglia is played in the cellos as one character is accused of coughing, and the scene then proceeds with 21 variations on that theme, culminating in the singing of ‘eine schöne fixe Idee.' An eighth note moto perpetuum dominates the last scene, while a motif consisting of a minor chord with a major seventh accompanies the singing of  'Wir arme Leut.' Two characters in this work are related by a B-F tritone, and a madman observes that it reeks of blood following a drunken sermon and the hunter's chorus. The title character is antagonized by the Captain and the Doctor, provoking him into killing Marie for her adultery with the Drum Major. For 10 points, name this opera based on a Buchner play, a work of Alban Berg. 
The title character of this work sings ‘Der Mensch ist ein Abgrund.'
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