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17/13 |0 0 0 0 0 -1 1>

464.4277 cents

sound sample

In 17-limit Just Intonation, 17/13 is the "septendecimal sub-fourth," measuring about 464.4¢. It is the mediant between 13/10 and 4/3 and falls in the categorically-ambiguous zone between supermajor third and perfect fourth that Margo Schulter calls interseptimal. It appears in the harmonic series between the 13th and 17th harmonics.

See: Gallery of Just Intervals