In the final scene of the opera, after Salome kisses Jochanaan's severed head, the music builds to a dramatic climax, which ends with a cadence involving a very dissonant unorthodox chord at measure 360 in the score. This single chord has been widely commented on. It has been called "the most sickening chord in all opera", an "epoch-making dissonance with which Strauss takes Salome...to the depth of degradation", and "the quintessence of Decadence: here is ecstasy falling in upon itself, crumbling into the abyss". The chord is often described as polytonal, with a low A7 (a dominant seventh chord) merged with a higher F-sharp major chord. It forms part of a cadence in the key of C-sharp major and is approached and resolved from C–sharp major chords. Not only is the chord shockingly dissonant, especially in its musical context and rich orchestration, it has broader significance due in part to Strauss's careful use of keys and leitmotifs to symbolize the opera's characters, emotions such as desire, lust, revulsion, and horror, as well as doom and death. A great deal has been written about this single chord and its function within the large-scale formal structure of the entire opera.
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