It is improper, to expressly pursue the Urlinie in performance and to single out its tones...for the purpose of communicating the Urlinie to the list… - Heinrich Schenker

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It is improper, to expressly pursue the Urlinie in performance and to single out its tones...for the purpose of communicating the Urlinie to the listener." Rather, "for the performer, the Urlinie provides, first of all, a sense of direction. It serves a somewhat equivalent function to that which a road map serves for a mountain climber.