Example 43. Examples of multivalence in music theory: (a) Gottfried Weber demonstrating his concept Mehrdeutigkeit in the opening of Mozart’s String Quartet in C major, K. 465, “Dissonance”; (b) Rameau’s double emploi; (c) neighbor-tone vs. chordal analysis of Wagner’s Tarnhelm leitmotif; (d) Lewin’s dual perception analysis of the Siegmund/Sieglinde progression from Wagner’s Die Walküre; (e) the rabbit/duck illusion (dubbit) discussed by Joseph Jastrow, Ludwig Wittgenstein, and David Lewin; (f) Lewin’s product network, showing both harmonic- and melodic-generation of parallel organum. [To zoom in/out, hold command or control, and press +/-]