12:15:18:20

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¢
Prime limit	5
Genus	32⋅5 (45)
Intervallic odd limit	9
Otonal odd limit	15
Utonal odd limit	15
Consistent edos (d ≥ 2)	12edo*, 19edo**, 34edo*, 38edo*, …
* 2 ≤ d < 4; ** 4 ≤ d < 8; *** 8 ≤ d < 16; …

The just added sixth chord is a 5-prime-limit, 9-odd-limit chord of just intonation which is an "ASS", or anomalous saturated suspension. In close position, it is 12:15:18:20 (1⁄1–5⁄4–3⁄2–5⁄3), with steps 5/4, 6/5 and 10/9. It can also be voiced as 10:12:15:18 (1⁄1–6⁄5–3⁄2–9⁄5), in which form it can be called a just minor seventh chord.