7:9:11

7:9:11 is a chord. It sort of sounds like an augmented fifth chord, including two types of third, a 9/7 supermajor third, and a 11/9 neutral third.

Chord information

Harmonics	7:9:11
Subharmonics	1/(99:77:63)
Intervals from root	1/1–9/7–11/7
Cents from root	0¢–435¢–782¢
Step intervals	9/7, 11/9
Step cents	435¢, 347¢
Color names	ru loru 5 r(1or5)
Prime limit	11
Genus	32⋅7⋅11 (693)
Intervallic odd limit	11
Otonal odd limit	11
Utonal odd limit	99
Consistent edos (d ≥ 2)	3edo*, 11edo*, 14edo*, 17edo*, …
* 2 ≤ d < 4; ** 4 ≤ d < 8; *** 8 ≤ d < 16; …

It is one of the simplest chords that truly sounds xenharmonic. 6:7:9:11 and variants are another such simple xen chords.

Audio of close voicings

7:9:11

9:11:14

11:14:18

Notable voicings

Voices	EFR	Hi-lo name	Special properties
3 voices	7:9:11	basic	AOV, isoharmonic, root position
	7:11:18	hi3
	9:11:14	hiR	1st inversion
	11:14:18	lo5	2nd inversion
4 voices	7:9:11:14	add8
	7:11:18:28	lo5Radd8

Related chords

Plausible homonyms: all, min6 no5 or aug5 chords.

Notable extensions:

• 7:9:11:13
• 7:9:11:13:15
• 7:11:15

Similar chords:

• 7:9:12 (substitutes 11/7 for 12/7)
• 14:18:21 (substitutes 11/7 for 3/2)

Lower limit soundalikes:

• 20:25:32:40 (5-limit)

Higher limit soundalikes:

• 8:10:13 (13-limit)
• 11:14:17 (17-limit)