64:81:96 is a 3-limit major triad found on the I, IV, and V of the Pythagorean diatonic scale.

Chord information
Harmonics 64:81:96
Subharmonics 1/(81:64:54)
Intervals from root 1/181/643/2
Cents from root 408¢702¢
Step intervals 81/64, 32/27
Step cents 408¢, 294¢
Prime limit 3
Genus 34 (81)
Intervallic odd limit 81
Otonal odd limit 81
Utonal odd limit 81
Consistent edos (d ≥ 2) 12edo**, 17edo*, 24edo*, 29edo*, …

It is sometimes used as a 3-limit approximation of 4:5:6, but is also used in its own right as a chord with a less stable third.

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The main article for this category is Major triad.