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A small project, to measure the visual bias when judging tritones. The "tritone" consists of 2 distinct shepard tones with half an octave tone difference, played successively. Every human has it's own way of perception: One would say after hearing the C-F# tritone, that the F# is clearly higher-pitched than the C, but another person would judge the C as the higher tone. We tried to measure, if there is a possibility of manipulating the perception by adding a visual stimulus by...