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.
The tuning employed here primarily uses perfect fifths, similar to Pythagorean tuning, but each of the fifths C-G, G-D, D-A, and B-F is slightly altered, or tempered, by one-fourth of a comma.