Unnoticeable commas are very small intervals. These commas are called "unnoticeable" because, being equal to or less than 3.5 cents, they are smaller than the average peak JND (just-noticeable difference) of human pitch perception, as illustrated by the research of Aaron Andrew Hunt. It is improbable that even a trained listener would be able to notice these intervals, and as such they a prime target for psychoacoustically informed microtempering. (However, a considerably larger comma can be unnoticeable in an adaptive tuning context. Instead of one large pitch shift of the entire comma, there can be many small pitch shifts of a fraction of a comma, one per chord change.)
For commas over 100 cents in size, see Large comma; for commas in between 30 and 100 cents in size, see Medium comma; and for commas over 3.5 cents in size, see Small comma.
Due to the wide range of sizes, cents values here and on the other commas pages are listed to 5 significant digits, instead of to a fixed number of decimal places as is the convention elsewhere on the wiki. Except for the 3-limit commas, the color name refers to both the comma and the temperament created when it is tempered out.
List of commas, by prime limit
3-limit commas
5-limit commas
7-limit commas
| Name(s)
|
Color Name
|
Ratio
|
Monzo
|
Cents
|
Named by
|
| Decovulture comma
|
Sasa-birugugu
|
ssrrg42
|
67108864/66976875
|
[26 -7 -4 -2⟩
|
3.4083
|
Xenllium (2021)
|
| Rainy comma
|
Laquinzo-atriyo
|
Lz5y32
|
2100875/2097152
|
[-21 0 3 5⟩
|
3.0706
|
+merlan #flirora (2020)
|
| Pontiqak comma
|
Lazozotritriyo
|
Lzzy9-2
|
95703125/95551488
|
[-17 -6 9 2⟩
|
2.7452
|
Xenllium (2021)
|
| Pessoalisma
|
Sasa-tribiru-agugu
|
ssr6gg-2
|
2147483648/2144153025
|
[31 -6 -2 -6⟩
|
2.6871
|
Aura (2023)
|
| Mitonisma
|
Laquadzo-agu
|
Lz4g2
|
5250987/5242880
|
[-20 7 -1 4⟩
|
2.6749
|
Xenllium (2021)
|
| Horwell comma
|
Lazoquinyo
|
Lzy5-2
|
65625/65536
|
[-16 1 5 1⟩
|
2.3495
|
|
| Forge comma
|
Lala-trizo-aquingu
|
LLz3g52
|
1640558367/1638400000
|
[-19 14 -5 3⟩
|
2.2792
|
Aura (2022)
|
| Neptunisma
|
Laruruleyo
|
Lrry11-4
|
48828125/48771072
|
[-12 -5 11 -2⟩
|
2.0240
|
Xenllium (2021)
|
| Septiennealimma
|
Tritrizo
|
z95
|
40353607/40310784
|
[-11 -9 0 9⟩
|
1.8382
|
Eliora, Flora Canou (2021)
|
| Meter
|
Latriru-asepyo
|
Lr3y7-4
|
703125/702464
|
[-11 2 7 -3⟩
|
1.6283
|
|
| Skeetsma
|
Lala-rutrigu
|
LLrg3-2
|
14348907/14336000
|
[-14 15 -3 -1⟩
|
1.5580
|
Jerdle (2021)
|
| Wizma
|
Quinzo-ayoyo
|
z5yy3
|
420175/419904
|
[-6 -8 2 5⟩
|
1.1170
|
|
| Supermatertisma
|
Lasepru-atritriyo
|
Lr7y9-6
|
52734375/52706752
|
[-6 3 9 -7⟩
|
0.90708
|
Xenllium (2021)
|
| Trienstonisma
|
Laquinru-agu
|
Lr5g-4
|
43046721/43025920
|
[-9 16 -1 -5⟩
|
0.83677
|
Xenllium (2021)
|
| Breedsma
|
Bizozogu
|
z4gg3
|
2401/2400
|
[-5 -1 -2 4⟩
|
0.72120
|
|
| 171-9/7-comma
|
Quadtribisa-netritrizo
|
|
|
[62 -342 0 171⟩
|
0.61971
|
|
| Supermasesquartisma
|
Laquadbiru-aquinyo
|
Lr8y5-6
|
184528125/184473632
|
[-5 10 5 -8⟩
|
0.51133
|
Xenllium (2021)
|
| 571-7-comma
|
|
|
|
[1603 0 0 -571⟩
|
0.40741
|
|
| Ragisma
|
Zoquadyo
|
zy41
|
4375/4374
|
[-1 -7 4 1⟩
|
0.39576
|
|
| Septiruthenia
|
Nela-lequadzo
|
L19z448
|
|
[-263 88 0 44⟩
|
0.37996
|
Eliora (2022)
|
| Akjaysma
|
Trisa-seprugu
|
s3r7g71
|
|
[47 -7 -7 -7⟩
|
0.33765
|
Aaron Krister Johnson (2011)
|
| Landscape comma
|
Trizogugu
|
z3g63
|
250047/250000
|
[-4 6 -6 3⟩
|
0.32544
|
|
| Izar comma, bapbo schismina
|
Saquadtrizo-asepgu
|
sz12g78
|
13841287201/13839609375
|
[0 -11 -7 12⟩
|
0.20987
|
|
| Nanisma
|
Quinbisaru
|
s10r7
|
|
[109 -67 0 -1⟩
|
0.18904
|
Margo Schulter (2002)
|
| laleruyo (171&1547&3125)
|
Laleruyo
|
Lr11y11-8
|
3955078125/3954653486
|
[-1 4 11 -11⟩
|
0.18588
|
|
| 87-fold starling comma
|
Twenetri-zotrigu
|
|
|
[86 174 -261 87⟩
|
0.14469
|
|
| Starscape comma
|
Latritriru-ayo
|
Lr9y-6
|
645700815/645657712
|
[-4 17 1 -9⟩
|
0.11557
|
|
| Nommisma
|
Quinla-zoyoyo
|
L5zzy-4
|
|
[-55 30 2 1⟩
|
0.10336
|
Flora Canou (2023)
|
| Euzenius comma
|
Sabiruquinyo
|
srry10-3
|
78125000/78121827
|
[3 -13 10 -2⟩
|
0.070314
|
|
| 171&1547&4973 comma
|
Satwethezo-atritribigu
|
sz23g1815
|
|
[1 -15 -18 23⟩
|
0.023986
|
|
| trisa-quinbiru-agu (441&1848&3125)
|
Trisa-quinbiru-agu
|
s3r10g-3
|
|
[51 -13 -1 -10⟩
|
0.012210
|
|
| Termite
|
Satritribiru-athiseyo
|
sr18y37-14
|
|
[9 -28 37 -18⟩
|
0.0010723
|
|
| Neutrino
|
|
|
|
[1889 -2145 138 424⟩
|
1.6361 × 10-10
|
|
11-limit commas
| Name(s)
|
Color Name
|
Ratio
|
Monzo
|
Cents
|
Named by
|
| Lifthrasirsma
|
|
|
536 870 912 / 535 869 675
|
[29 -11 -2 0 -2⟩
|
3.2317
|
Flora Canou (2023)
|
| Swetisma
|
Lururuyo
|
1urry-2
|
540/539
|
[2 3 1 -2 -1⟩
|
3.2090
|
Manuel Op de Coul (2004)
|
| Wizardharry comma, pine comma
|
Triluyo
|
1u3y31
|
4000/3993
|
[5 -1 3 0 -3⟩
|
3.0323
|
Godtone (2023) for pine comma
|
| Symbiotic comma
|
Salozo
|
s1oz2
|
19712/19683
|
[8 -9 0 1 1⟩
|
2.5488
|
Aura (2020)
|
| Vishdel comma
|
Saloquadgu
|
s1og42
|
5632/5625
|
[9 -2 -4 0 1⟩
|
2.1531
|
|
| Nexus comma, nexisma
|
Tribilo
|
1o6-2
|
1771561/1769472
|
[-16 -3 0 0 6⟩
|
2.0427
|
Aura (2020)
|
| Tinge
|
Lolotrizo
|
1ooz32
|
41503/41472
|
[-9 -4 0 3 2⟩
|
1.2936
|
Gayle Young (2018), Todd Harrop (2020)
|
| Olympia
|
Salururu
|
s1urr1
|
131072/130977
|
[17 -5 0 -2 -1⟩
|
1.2552
|
Flora Canou (2021)
|
| 11-cycle schisma, 37-11-comma
|
Quinsa-thiselu
|
s51u379
|
|
[128 0 0 0 -37⟩
|
1.2361
|
|
| Undecimal hemifourths comma
|
Bilozogugu
|
1oozzg42
|
160083/160000
|
[-8 3 -4 2 2⟩
|
0.89784
|
|
| Sesdecal
|
Laquadlu-asepyo
|
L1u4y7-2
|
234375/234256
|
[-4 1 7 0 -4⟩
|
0.87923
|
|
| Frameshift comma
|
Quadla-trilu
|
L41u3-3
|
22 876 792 454 961 / 22 866 405 883 904
|
[-34 28 0 0 -3⟩
|
0.78620
|
Aura (2021)
|
| Hemigail
|
Quadlo-atriru
|
1o4r3-3
|
43923/43904
|
[-7 1 0 -3 4⟩
|
0.74905
|
|
| Lehmerisma
|
Loloruyoyo
|
1ooryy-2
|
3025/3024
|
[-4 -3 2 -1 2⟩
|
0.57240
|
Gene Ward Smith (2004)
|
| Quartisma
|
Saquinlu-azo
|
s1u5z3
|
117 440 512 / 117 406 179
|
[24 -6 0 1 -5⟩
|
0.50619
|
Aura (2020)
|
| Kalisma, Gauss' comma
|
Bilorugu
|
1oorrgg-2
|
9801/9800
|
[-3 4 -2 -2 2⟩
|
0.17665
|
Margo Schulter (2000)
|
| Odiheim
|
Luluquinzo-aquadgu
|
1uuz5g44
|
151263/151250
|
[-1 2 -4 5 -2⟩
|
0.14879
|
|
| Syntonisma
|
Trisa-lusepyo
|
s31uy72
|
83 886 080 000 000 / 83 881 572 334 857
|
[30 -27 7 0 -1⟩
|
0.093031
|
Xenllium (2023)
|
| Parimo
|
Satribilo-agu
|
s1o6g1
|
1771561/1771470
|
[-1 -11 -1 0 6⟩
|
0.088931
|
|
| Parisma
|
Laquadlu-arurugu
|
L1u4rrg-2
|
14348907/14348180
|
[-2 15 -1 -2 -4⟩
|
0.087717
|
|
| Ultimo
|
Quadlo-asepru-ayoyo
|
1o4r7yy-5
|
3294225/3294172
|
[-2 2 2 -7 4⟩
|
0.027854
|
|
| Parismina
|
Sasa-quinbilo-azozo
|
ss1o10zz2
|
2 541 867 610 898 / 2 541 865 828 329
|
[1 -26 0 2 10⟩
|
0.0012141
|
|
13-limit commas
17-limit commas
19-limit commas
| Name(s)
|
Color Name
|
Ratio
|
Monzo
|
Cents
|
Named by
|
Undevicesimal comma, undevicesimal schisma, Boethius' comma, Hunt 19-minor mediant comma
|
Lano
|
L19o1
|
513/512
|
[-9 3 0 0 0 0 0 1⟩
|
3.3780
|
Plainsound Music Edition (2020)[1]
|
| Buddhisma
|
Nosolulu
|
19o17o1uu2
|
969/968
|
[-3 1 0 0 -2 0 1 1⟩
|
1.7875
|
Xenllium (2023)
|
| Password, Eratosthenes' comma
|
Sanogu
|
s19og2
|
1216/1215
|
[6 -5 -1 0 0 0 0 1⟩
|
1.4243
|
|
| Solvejgsma
|
Nutrilo-arugu
|
19u1o3rg-2
|
1331/1330
|
[-1 0 -1 -1 3 0 0 -1⟩
|
1.3012
|
Xenllium (2023)
|
| Aureusma
|
Nunusosoyo
|
19uu17ooy1
|
1445/1444
|
[-2 0 1 0 0 0 2 -2⟩
|
1.1985
|
Flora Canou (2021)
|
| Pinkanberry
|
Nuthothogu
|
19u3o3og1
|
1521/1520
|
[-4 2 -1 0 0 2 0 -1⟩
|
1.1386
|
Kaiveran (2021)
|
| Kevolisma
|
Nulozoyo
|
19u1ozy1
|
1540/1539
|
[2 -4 1 1 1 0 0 -1⟩
|
1.1245
|
Xenllium (2023)
|
| Ramanujanisma
|
Nothozo
|
19o3oz2
|
1729/1728
|
[-6 -3 0 1 0 1 0 1⟩
|
1.0016
|
Frédéric Gagné (2021)
|
| Heartlandisma
|
Nonoloruru
|
19oo1orr1
|
3971/3969
|
[0 -4 0 -2 1 0 0 2⟩
|
0.87216
|
Xenllium (2023)
|
| Trichthonisma
|
Nulotrigu
|
19u1og31
|
2376/2375
|
[3 3 -3 0 1 0 0 -1⟩
|
0.72879
|
Xenllium (2023)
|
| Crawma
|
Nuquadso-atrithu
|
19u17o43u32
|
83521/83486
|
[-1 0 0 0 0 -3 4 -1⟩
|
0.72564
|
ground fault (2023)
|
| Blumeyer comma
|
Nosuthulu
|
19o17u3u1u1
|
2432/2431
|
[7 0 0 0 -1 -1 -1 1⟩
|
0.71200
|
Douglas Blumeyer (2015)
|
| Neovulture comma, neovulturisma
|
Nothulozogugu
|
19o3u1ozgg2
|
2926/2925
|
[1 -2 -2 1 1 -1 0 1⟩
|
0.59177
|
Xenllium (2023)
|
| Neomirkwai comma, neomirkwaisma
|
Nuluzozogu
|
19u1uzzg2
|
3136/3135
|
[6 -1 -1 2 -1 0 0 -1⟩
|
0.55214
|
Xenllium (2023)
|
| Martebisma
|
Nunuthotriyo
|
19uu3oy3-2
|
3250/3249
|
[1 -2 3 0 0 1 0 -2⟩
|
0.53277
|
Xenllium (2023)
|
| Neosatanisma
|
Nusuthuzoyoyo
|
19u17u3uzyy-2
|
4200/4199
|
[3 1 2 1 0 -1 -1 -1⟩
|
0.41225
|
Xenllium (2023)
|
| Neovish comma, neovishma
|
Nonolurugugu
|
19oo1urgg2
|
5776/5775
|
[4 -1 -2 -1 -1 0 0 2⟩
|
0.29975
|
Xenllium (2023)
|
| Neogrendel comma, neogrendelisma
|
Nosuluzoyo
|
19o17u1uzy1
|
5985/5984
|
[-5 2 1 1 -1 0 -1 1⟩
|
0.28929
|
Xenllium (2023)
|
| BMO schismina
|
Sabinothu
|
s19oo3uu2
|
369664/369603
|
[10 -7 0 0 0 -2 0 2⟩
|
0.28570
|
|
| Neonewt comma, neonewtisma
|
Nothotriru-ayoyo
|
19o3or3yy-2
|
6175/6174
|
[-1 -2 2 -3 0 1 0 1⟩
|
0.28038
|
Xenllium (2023)
|
| Frouggie comma
|
Nusuquinthu-aquadlo
|
19u17u3u51o4-3
|
119939072/119927639
|
[13 0 0 0 4 -5 -1 -1⟩
|
0.16503
|
|
| Lakisma
|
Saquadnoso-agu
|
s19o417o4g5
|
10884540241/10883911680
|
[-12 -12 -1 0 0 0 4 4⟩
|
0.09998
|
+merlan #flirora (2021)
|
| Pollar comma
|
Nunusuquintho-alulu
|
19uu17u3o51uu1
|
742586/742577
|
[1 0 0 0 -2 5 -1 -2⟩
|
0.020982
|
|
| Decimillisma, 19-limit decimill
|
Sanosorurutrigu
|
s19o17orrg32
|
165376/165375
|
[9 -3 -3 -2 0 0 1 1⟩
|
0.010469
|
|
| Devicisma
|
Nunusothutrilo-azogu
|
19uu17o3u1o3zg1
|
633556/633555
|
[2 -3 -1 1 3 -1 1 -2⟩
|
0.0027326
|
Xenllium (2023)
|
23-limit commas
Higher-limit commas
Notes