Two tones that can be expressed as a simple ratio of each other tend to sound pleasant when played together.This relates to the concept of ______.

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This concept is known as consonance, which refers to the harmony created when two or more tones are played together and their frequencies form simple ratios with each other, such as octaves (2:1) or fifths (3:2). Dissonance, on the other hand, refers to the tension or clash created by tones with frequencies that do not form simple ratios with each other. Assonance and convergence are not relevant concepts in this context.

Two Tones That Can Be Expressed as a Simple Ratio