12:15:18:20

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Chord information
Harmonics 12:15:18:20
Subharmonics 1/(15:12:10:9)
Intervals from root 1/1 – 5/4 – 3/2 – 5/3
Cents from root 0¢ 386¢ 702¢ 884¢
Step intervals 5/4, 6/5, 10/9
Step cents 386¢, 316¢, 182¢
Color name yo-6 or y6
Prime limit 5
Genus 32 ⋅ 5 (45)
Intervallic odd limit 9
Otonal odd limit 15
Utonal odd limit 15

12:15:18:20 is an added sixth chord in the 5-limit, with steps 5/4, 6/5, and 10/9. See also its homonym 10:12:15:18 (1⁄1–6⁄5–3⁄2–9⁄5), a minor seventh chord.

In the 9-odd-limit, the chord is an anomalous saturated suspension.