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This review of David Tudor’s performance in Cologne titled “A Thing with Whistle” (which refers to Tudor’s use of the whistle in the Concert for Piano and Orchestra) describes Ernst Krenek and Karlheinz Stockhausen’s work as monotonous (despite their complex structure), and John Cage’s Concert as something that is “grotesquely comical” (Grotesk-Komische). Amidst the Concert’s wild and humorous range of sounds, the reviewer questions Cage’s sincerity as an experimentalist. They regard Pierre Boulez and Mauricio Kagel’s compositions as more palatable in their clear relationship to the tradition of Neue Musik (New Music).