The Dr K–Sextett is the fourth movement of the Serenade, Op. 24, a significant chamber music composition by the Austrian composer Arnold Schoenberg, written between 1920 and 1923. This movement is particularly notable for its early and extensive application of Schoenberg's twelve-tone technique, also known as dodecaphony, and for its satirical content.
The movement is scored for a bass-baritone voice and an instrumental ensemble comprising clarinet, bass clarinet, mandolin, guitar, cello, and viola. The vocal part is set to a text written by Schoenberg himself, which serves as a biting critique of music critics. The "Dr K" in the title is widely understood to be a thinly disguised reference to the influential German music critic Alfred Kerr (1867–1948), whose often harsh reviews and perceived lack of understanding of new music were a source of frustration for Schoenberg and other avant-garde composers.
Musically, the Dr K–Sextett is a complex and highly structured piece, exemplifying Schoenberg's developing twelve-tone compositional method. It showcases the systematic use of a tone row to govern melodic and harmonic relationships throughout the movement. The inclusion of a vocal part with a self-penned, satirical text within a chamber work was innovative and reflective of Schoenberg's desire to integrate intellectual commentary with musical expression. The movement stands as an important work in Schoenberg's oeuvre, demonstrating his early mastery of the twelve-tone system and his readiness to engage in artistic and social commentary through his compositions.