Major third

Major third may refer to:

JI intervals

Many JI intervals are called "major thirds". However, the term usually refers to one of these three intervals:

• 5/4, the classical major third of about 386 cents.
• 9/7, the septimal major third of about 435 cents.
• 81/64, the Pythagorean major third of about 408 cents.

Concepts

• Major third (interval region), an interval region centered around 400 cents
• Major third (diatonic interval category), the major variety of the interval spanning two steps of the diatonic scale

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