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CU-Boulder
PHYS 1240 -
Musical illusions
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Physics 1240 Tues 5/2/06Today: Musical illusionsNext time: Review for final examOutline• Post-test• Deutsch’s high-low illusion• Shepard’s scale illusions•Categorical perception•Deutsch’s scale illusionAscending/Descending Scale illusions (often called Shepard’s scale) -- like Escher’s “Ascending and Descending”IPO track 52Ascending/Descending Scale illusionIPO track 52Categorical Perception – “b” or “p” sound? Inanimate or living? Natural or electronic?Musical example - Jean-Claud Risset Sud (1987)EscherDeutsch Scale Illusion – “Brain makes musical order out of musical chaos”Deutsch Track
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