Alexander Zemlinsky or Alexander von Zemlinsky was an Austrian composer, conductor, and teacher.
While the influence of Brahms is evoked in Zemlinsky's early works (prompting encouragement from Brahms himself), an original voice is present from the first works on, handling dissonances in a much freer manner than Brahms. Later works adopt the kind of extended harmonies that Wagner had introduced whilst also drawing influence from Mahler. In contrast to his friend Schoenberg, he never wrote atonal music, and never used the twelve-tone technique. However, late works such as the Symphonische Gesänge, Sinfonietta and third and fourth string quartets move away from post-Romanticism towards a leaner, harder-edged idiom that incorporates elements of Neue Sachlichkeit, Neoclassicism and even jazz.