Unnoticeable comma

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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.

3-limit commas

Name(s) Color name Monzo Cents
359-comma Wa-359 w-359 [-569 359 1.8453
Sasktel comma Wa-306 w-306 [485 -306 1.7697
Satanic comma Wa-665 w-665 [-1054 665 0.075575
15601-comma Wa-15601 w-15601 [24727 -15601 0.031499
31867-comma Wa-31867 w-31867 [-50508 31867 0.012577

5-limit commas

Name(s) Color name Ratio Monzo Cents
dodifo Quadla-sepquinyo L4y35-9 [-67 -9 35 3.3850
vishnuzma, semisuper Sasepbigu sg144 6115295232/6103515625 [23 6 -14 3.3380
enneadeca, 19-tone-comma Neyo y19-4 19073486328125/19042491875328 [-14 -19 19 2.8155
vavoom comma Quinla-seyo L5y17-7 [-68 18 17 2.5232
tricot comma Quadsa-triyo s4y33 68719476736000/68630377364883 [39 -29 3 2.2461
schisma Layo Ly-2 32805/32768 [-15 8 1 1.9537
counterschisma Tribilagu L6g-5 [-69 45 -1 1.6613
septendecima Lala-sebiyo LLy34-8 [-52 -17 34 1.4313
hemithirds comma, lunama Sasa-quintrigu ssg155 274877906944/274658203125 [38 -2 -15 1.3843
minortone comma, minortonma Trila-segu L3g172 [-16 35 -17 1.0919
ennealimma Satritribiyo sy18-3 7629394531250/7625597484987 [1 -27 18 0.86183
astro Tribisa-thiwegu s6g3110 [91 -12 -31 0.81486
gaster comma Quadbila-negu L8g19-3 [-70 72 -19 0.79950
kwazy Quadla-quadquadyo L4y16-6 [-53 10 16 0.56943
whoosh Saletrigu sg337 [37 25 -33 0.52246
egads Setriyo y51-9 [-36 -52 51 0.33936
monzisma Quinsa-yoyo s5yy4 [54 -37 2 0.29240
fortune Tritrila-sepbiyo L9y14-9 [-107 47 14 0.27703
gross Quinbisa-fosegu s10g4715 [144 -22 -47 0.24543
senior Quadla-sepquingu L4g354 [-17 62 -35 0.23007
665&3684 comma Quintritrilayo L45y-31 [-500 314 1 0.18399
raider Tritrisa-thiseyo s9y371 [71 -99 37 0.062327
pirate Quinla-sepsepyo L5y49-12 [-90 -15 49 0.046966
viking Nela-siweyo L19y61-23 [-251 69 61 0.031605
Kirnberger's atom Sepbisa-quadtrigu s14g1212 [161 -84 -12 0.015361
selenia [-433 -137 280 0.0047636
titania [2746 -521 -827 0.0031829
quark Twethebila-sequinyo [-573 237 85 8.8361 × 10-4
scamp [-5836 4293 -417 3.3472 × 10-5
rover [1634 1502 -1729 2.7513 × 10-5
rascal [-7470 2791 1312 5.9596 × 10-6

7-limit commas

Name(s) Color name Ratio Monzo Cents
decovulture Sasa-birugugu ssrrg42 67108864/66976875 [26 -7 -4 -2 3.4083
lux Sasa-quinru-ayoyo ssr5yy-2 26843545600/26795786661 [30 -13 2 -5 3.0829
rainy Laquinzo-atriyo Lz5y32 2100875/2097152 [-21 0 3 5 3.0706
pontiqak Lazozotritriyo Lzzy9-2 95703125/95551488 [-17 -6 9 2 2.7452
mitonisma Laquadzo-agu Lz4g2 5250987/5242880 [-20 7 -1 4 2.6749
horwell Lazoquinyo Lzy5-2 65625/65536 [-16 1 5 1 2.3495
neptunisma Laruruleyo Lrry11-4 48828125/48771072 [-12 -5 11 -2 2.0240
septiennealimma Tritrizo z95 40353607/40310784 [-11 -9 0 9 1.8382
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
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
trienstonisma Laquinru-agu Lr5g-4 43046721/43025920 [-9 16 -1 -5 0.83677
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
571-7-comma [1603 0 0 -571 0.40741
ragisma Zoquadyo zy41 4375/4374 [-1 -7 4 1 0.39576
44-septimal comma Nela-lequadzo L19z448 [-263 88 0 44 0.37996
akjaysma, 5\7 octave comma Trisa-seprugu s3r7g71 [47 -7 -7 -7 0.33765
landscape Trizogugu z3g63 250047/250000 [-4 6 -6 3 0.32544
izar, bapbo schismina Saquadtrizo-asepgu sz12g78 13841287201/13839609375 [0 -11 -7 12 0.20987
nanisma Quinbisaru s10r7 [109 -67 0 -1 0.18904
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 Latritriru-ayo Lr9y-6 645700815/645657712 [-4 17 1 -9 0.11557
quinla-zoyoyo (12&53&612) Quinla-zoyoyo L5zzy-4 [-55 30 2 1 0.10336
euzenius 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
11-cycle schisma, 37-11-comma Quinsa-thiselu s51u379 [128 0 0 0 -37 1.2361
swetisma Lururuyo 1urry-2 540/539 [2 3 1 -2 -1 3.2090
wizardharry Triluyo 1u3y31 4000/3993 [5 -1 3 0 -3 3.0323
symbiotic comma, symbiosma Salozo s1oz2 19712/19683 [8 -9 0 1 1 2.5488
vishdel Saloquadgu s1og42 5632/5625 [9 -2 -4 0 1 2.1531
nexus comma, nexisma Tribilo 1o6-2 1771561/1769472 [-16 -3 0 0 6 2.04265
tinge Lolotrizo 1ooz32 41503/41472 [-9 -4 0 3 2 1.29360
olympia Salururu s1urr1 131072/130977 [17 -5 0 -2 -1 1.25524
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 [-34 28 0 0 -3 0.78620
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
quartisma Saquinlu-azo s1u5z3 117440512/117406179 [24 -6 0 1 -5 0.50619
kalisma, Gauss' comma Bilorugu 1oorrgg-2 9801/9800 [-3 4 -2 -2 2 0.17665
odiheim Luluquinzo-aquadgu 1uuz5g44 151263/151250 [-1 2 -4 5 -2 0.14879
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 [1 -26 0 2 10 0.0012141

13-limit commas

Name Color name Ratio Monzo Cents
wilschisma Sathoyo s3oy2 532480/531441 [13 -12 1 0 0 1 3.3814
bean Sathuquinlu s3u1u52 2097152/2093663 [21 0 0 0 -5 -1 2.8826
tunbarsma Thuquadyo 3uy4-2 625/624 [-4 -1 4 0 0 -1 2.7722
island comma Bithogu 3oogg2 676/675 [2 -3 -2 0 0 2 2.5629
squbema Lathuru L3ur-2 729/728 [-3 6 0 -1 0 -1 2.3764
petrma Trithu-aloyoyo 3u31oyy-2 2200/2197 [3 0 2 0 1 -3 2.3624
nicola Thululuzoyoyo 3u1uuzyy1 1575/1573 [0 2 2 1 -2 -1 2.1998
sinbadma Tholozotrigu 3o1ozg32 1001/1000 [-3 0 -3 1 1 1 1.7303
cantonisma Trithoru-ayo 3o3r3y-2 10985/10976 [-5 0 1 -3 0 3 1.4190
lummic Tholotriru-agu 3o1or3g-2 1716/1715 [2 1 -1 -3 1 1 1.0092
ibnsinma Tholuruyo 3o1ury1 2080/2079 [5 -3 1 -1 -1 1 0.83252
phaotic, phaotisma Sathotriyo s3uy31 256000/255879 [11 -9 3 0 0 -1 0.81847
schismina Sathurugu s3urg1 4096/4095 [12 -2 -1 -1 0 -1 0.42272
leprechaun comma Thotholuyoyo 3oo1uyy1 4225/4224 [-7 -1 2 0 -1 2 0.40981
jacobin Thotrilu-agu 3o1u3g2 6656/6655 [9 0 -1 0 -3 1 0.26012
harmonisma Thuthutrilo-aru 3uu1o3r-2 10648/10647 [3 -2 0 -1 3 -2 0.16260
pentonisma Saquinthuzogu s3u5z5g54 [24 -5 -5 5 0 -5 0.14765
chalmersia Lathotholurugugu L3oo1urgg1 123201/123200 [-6 6 -2 -1 -1 2 0.014052

17-limit commas

Name Color name Ratio Monzo Cents
september comma, septendecimal bridge comma Sutholoruyo 17u3o1ory-2 715/714 [-1 -1 1 -1 1 1 -1 2.4230
horizon comma Sothuzozo 17o3uzz2 833/832 [-6 0 0 2 0 -1 1 2.0796
ainos comma, ainma Sutholugu 17u3o1ug1 936/935 [3 2 -1 0 -1 1 -1 1.8506
twosquare comma Sulolo 17u1oo-2 1089/1088 [-6 2 0 0 2 0 -1 1.5905
septendecimal quartertones comma Sosolurugu 17oo1urg2 1156/1155 [2 -1 -1 -1 -1 0 2 1.4983
noellisma Subizoyo 17uzzyy1 1225/1224 [-3 -2 2 2 0 0 -1 1.4138
Sothubiruyo 17o3urryy-2 1275/1274 [-1 1 2 -2 0 -1 1 1.3584
xenisma Sululutrizo 17u1uuz32 2058/2057 [1 1 0 3 -2 0 -1 0.84143
Sothologu 17o3o1og2 2431/2430 [-1 -5 -1 0 1 1 1 0.71230
septendecimal six-tones comma Sosothugugu 17oo3ugg2 2601/2600 [-3 2 -2 0 0 -1 2 0.66573
chlorisma Sutriru 17ur3-3 5832/5831 [3 6 0 -3 0 0 -1 0.29688
(18/17)11(16/15) comma Lalesu-agu L17u11g-7 [14 21 -1 0 0 0 -11 0.23180
flashma Sotholuzotrigu 17o3o1uzg33 12376/12375 [3 -2 -3 1 -1 1 1 0.13989
sparkisma Sululuruyoyo 17u1uuryy-2 14400/14399 [6 2 2 -1 -2 0 -1 0.12023
scintillisma Lasuthuluquadzo-agu L17u3u1uz4g2 194481/194480 [-4 4 -1 4 -1 -1 -1 0.0089018

19-limit commas

Name Color name Ratio Monzo Cents
undevicesimal comma, undevicesimal schisma[1],
Boethius' comma, Hunt 19-minor mediant comma
Lano L19o1 513/512 [-9 3 0 0 0 0 0 1 3.3780
password, Eratosthenes' comma Sanogu s19og2 1216/1215 [6 -5 -1 0 0 0 0 1 1.4243
aureusma Nunusosoyo 19uu17ooy1 1445/1444 [-2 0 1 0 0 0 2 -2 1.1985
pinkanberry Nuthothogu 19u3o3og1 1521/1520 [-4 2 -1 0 0 2 0 -1 1.1386
ramanujanisma Nothozo 19o3oz2 1729/1728 [-6 -3 0 1 0 1 0 1 1.0016
Blumeyer comma Nosuthulu 19o17u3u1u1 2432/2431 [7 0 0 0 -1 -1 -1 1 0.71200
BMO schismina Sabinothu s19oo3uu2 369664/369603 [10 -7 0 0 0 -2 0 2 0.28570
frouggie comma Nusuquinthu-aquadlo 19u17u3u51o4-3 119939072/119927639 [13 0 0 0 4 -5 -1 -1 0.16503
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

Higher-limit commas

Name Color name Ratio Monzo Cents
cmloegcmluinisma (/ˈʃmlɛg.ʃmlɪ.nɪs.mə/) Twenutwethonu 29u23o19u1 552/551 [3 1 0 0 0 0 0 -1 1 -1 3.139138
owowhatsthisma Thiwutwethogu 31u23og2 621/620 [-2 3 -1 0 0 0 0 0 1 0 -1⟩ 2.79006
eroğluisma Bifowutweno 41uu29oo2 1682/1681 [1 0 0 0 0 0 0 0 0 2 0 0 -2 1.029577
yunzee comma Lathiwuzozo L31uzz2 3969/3968 [-7 4 0 2 0 0 0 0 0 0 -1⟩ 0.43624
palimilli 1003001o23o1u1 23069023/23068672 2-21 * 11-1 * 23 * 1003001 0.026341