Alessandro ARBO, "Consider that it's a Waltz...". Reflexions on a theme of Wittgenstein

Musical expression is analyzed by Wittgenstein in its intransitive meaning, in the light of the practice and behaviour typical of a culture. In this perspective, the performance of ambivalent musical situations assumes a particular interest. Sometimes these make it possible to note changes of aspect similar to those which occur in the vision of ambiguous figures. Taking into account the differences between the two modes of perception, the analogy is tested by a series of examples of rhythmic and phrasing interpretation, where the change of aspect (from introductory to conclusive, from introductory motive to thematic set) depends on small modifications of tempo, dynamic, rhythm or timbre introduced by the performer.