This tuning uses mostly pure (perfect) fifths, as in Pythagorean tuning, but each of the fifths C–G, G–D, D–A and B–F is made smaller, i.e. tempered by 1/4 of the comma.
This tuning utilizes mostly pure fifths, like Pythagorean tuning, but each of the fifths C–G, G–D, D–A, and B–F are adjusted to be smaller, or tempered, by 1/4 of a comma.