Theory
ResearchFrontier structures and internal systems

Forte Set Class Catalog

Complete listing of all 224 pitch-class set classes in 12-TET, as catalogued by Allen Forte.

Showing 224 of 224 set classes
Forte # Prime FormIC VectorCard T-Sym I-Sym NamesZ-MateComplement
0-1[]<0,0,0,0,0,0>0Empty set, Null set12-1
1-1[0]<0,0,0,0,0,0>11Monad, Single note11-1
2-1[0,1]<1,0,0,0,0,0>21Minor second, Semitone, Half step10-1
2-2[0,2]<0,1,0,0,0,0>21Major second, Whole tone, Whole step10-2
2-3[0,3]<0,0,1,0,0,0>21Minor third10-3
2-4[0,4]<0,0,0,1,0,0>21Major third10-4
2-5[0,5]<0,0,0,0,1,0>21Perfect fourth, Perfect fifth10-5
2-6[0,6]<0,0,0,0,0,1>222Tritone, Augmented fourth, Diminished fifth10-6
3-1[0,1,2]<2,1,0,0,0,0>31Chromatic trichord, Phrygian trichord9-1
3-2[0,1,3]<1,1,1,0,0,0>3Minor second + minor third9-2
3-3[0,1,4]<1,0,1,1,0,0>3Minor second + major third9-3
3-4[0,1,5]<1,0,0,1,1,0>3Minor second + perfect fourth9-4
3-5[0,1,6]<1,0,0,0,1,1>3Viennese trichord, Minor second + tritone9-5
3-6[0,2,4]<0,2,0,1,0,0>31Whole-tone trichord9-6
3-7[0,2,5]<0,1,1,0,1,0>3Major second + perfect fourth, Quartal trichord9-7
3-8[0,2,6]<0,1,0,1,0,1>3Italian sixth trichord9-8
3-9[0,2,7]<0,1,0,0,2,0>31Quartal trichord, Stacked fourths9-9
3-10[0,3,6]<0,0,2,0,0,1>31Diminished trichord9-10
3-11[0,3,7]<0,0,1,1,1,0>3Minor triad, Major triad9-11
3-12[0,4,8]<0,0,0,3,0,0>333Augmented triad9-12
4-1[0,1,2,3]<3,2,1,0,0,0>41Chromatic tetrachord8-1
4-2[0,1,2,4]<2,2,1,1,0,0>4-8-2
4-3[0,1,3,4]<2,1,2,1,0,0>41-8-3
4-4[0,1,2,5]<2,1,1,1,1,0>4-8-4
4-5[0,1,2,6]<2,1,0,1,1,1>4-8-5
4-6[0,1,2,7]<2,1,0,0,2,1>41-8-6
4-7[0,1,4,5]<2,0,1,2,1,0>41Arabian tetrachord8-7
4-8[0,1,5,6]<2,0,0,1,2,1>41-8-8
4-9[0,1,6,7]<2,0,0,0,2,2>422-8-9
4-10[0,2,3,5]<1,2,2,0,1,0>41-8-10
4-11[0,1,3,5]<1,2,1,1,1,0>4-8-11
4-12[0,2,3,6]<1,1,2,1,0,1>4-8-12
4-13[0,1,3,6]<1,1,2,0,1,1>4-8-13
4-14[0,2,3,7]<1,1,1,1,2,0>4-8-14
4-Z15[0,1,4,6]<1,1,1,1,1,1>4All-interval tetrachord4-Z298-Z15
4-16[0,1,5,7]<1,1,0,1,2,1>4-8-16
4-17[0,3,4,7]<1,0,2,2,1,0>41Major-minor tetrachord8-17
4-18[0,1,4,7]<1,0,2,1,1,1>4Diminished major seventh, Augmented sixth chord8-18
4-19[0,1,4,8]<1,0,1,3,1,0>4Minor major seventh, Augmented triad + minor second8-19
4-20[0,1,5,8]<1,0,1,2,2,0>41Major seventh chord8-20
4-21[0,2,4,6]<0,3,0,2,0,1>41Whole-tone tetrachord8-21
4-22[0,2,4,7]<0,2,1,1,2,0>4Major triad + major second, Add9 (no 3rd)8-22
4-23[0,2,5,7]<0,2,1,0,3,0>41Quartal tetrachord, All-fourths tetrachord8-23
4-24[0,2,4,8]<0,2,0,3,0,1>41Augmented seventh chord8-24
4-25[0,2,6,8]<0,2,0,2,0,2>422French augmented sixth chord8-25
4-26[0,3,5,8]<0,1,2,1,2,0>41Minor seventh chord8-26
4-27[0,2,5,8]<0,1,2,1,1,1>4Dominant seventh chord, Half-diminished seventh8-27
4-28[0,3,6,9]<0,0,4,0,0,2>444Diminished seventh chord8-28
4-Z29[0,1,3,7]<1,1,1,1,1,1>4All-interval tetrachord4-Z158-Z29
5-1[0,1,2,3,4]<4,3,2,1,0,0>51Chromatic pentachord7-1
5-2[0,1,2,3,5]<3,3,2,1,1,0>5-7-2
5-3[0,1,2,4,5]<3,2,2,2,1,0>5-7-3
5-4[0,1,2,3,6]<3,2,2,1,1,1>5-7-4
5-5[0,1,2,3,7]<3,2,1,1,2,1>5-7-5
5-6[0,1,2,5,6]<3,1,1,2,2,1>5-7-6
5-7[0,1,2,6,7]<3,1,0,1,3,2>5-7-7
5-8[0,2,3,4,6]<2,3,2,2,0,1>51-7-8
5-9[0,1,2,4,6]<2,3,1,2,1,1>5-7-9
5-10[0,1,3,4,6]<2,2,3,1,1,1>5-7-10
5-11[0,2,3,4,7]<2,2,2,2,2,0>5-7-11
5-Z12[0,1,3,5,6]<2,2,2,1,2,1>51-5-Z367-Z12
5-13[0,1,2,4,8]<2,2,1,3,1,1>5-7-13
5-14[0,1,2,5,7]<2,2,1,1,3,1>5-7-14
5-15[0,1,2,6,8]<2,2,0,2,2,2>51-7-15
5-16[0,1,3,4,7]<2,1,3,2,1,1>5-7-16
5-Z17[0,1,3,4,8]<2,1,2,3,2,0>51-5-Z377-Z17
5-Z18[0,1,4,5,7]<2,1,2,2,2,1>5-5-Z387-Z18
5-19[0,1,3,6,7]<2,1,2,1,2,2>5-7-19
5-20[0,1,5,6,8]<2,1,1,2,3,1>5-7-20
5-21[0,1,4,5,8]<2,0,2,4,2,0>5-7-21
5-22[0,1,4,7,8]<2,0,2,3,2,1>51-7-22
5-23[0,2,3,5,7]<1,3,2,1,3,0>5-7-23
5-24[0,1,3,5,7]<1,3,1,2,2,1>5-7-24
5-25[0,2,3,5,8]<1,2,3,1,2,1>5-7-25
5-26[0,2,4,5,8]<1,2,2,3,1,1>5-7-26
5-27[0,1,3,5,8]<1,2,2,2,3,0>5-7-27
5-28[0,2,3,6,8]<1,2,2,2,1,2>5-7-28
5-29[0,1,3,6,8]<1,2,2,1,3,1>5-7-29
5-30[0,1,4,6,8]<1,2,1,3,2,1>5-7-30
5-31[0,1,3,6,9]<1,1,4,1,1,2>5-7-31
5-32[0,1,4,6,9]<1,1,3,2,2,1>5-7-32
5-33[0,2,4,6,8]<0,4,0,4,0,2>51Whole-tone pentachord7-33
5-34[0,2,4,6,9]<0,3,2,2,2,1>51Dominant ninth chord (no root), Dominant 97-34
5-35[0,2,4,7,9]<0,3,2,1,4,0>51Pentatonic scale, Major pentatonic, Minor pentatonic7-35
5-Z36[0,1,2,4,7]<2,2,2,1,2,1>5-5-Z127-Z36
5-Z37[0,3,4,5,8]<2,1,2,3,2,0>51-5-Z177-Z37
5-Z38[0,1,2,5,8]<2,1,2,2,2,1>5-5-Z187-Z38
6-1[0,1,2,3,4,5]<5,4,3,2,1,0>61Chromatic hexachord6-1
6-2[0,1,2,3,4,6]<4,4,3,2,1,1>6-6-2
6-Z3[0,1,2,3,5,6]<4,3,3,2,2,1>6-6-Z366-Z36
6-Z4[0,1,2,4,5,6]<4,3,2,3,2,1>61-6-Z376-Z37
6-5[0,1,2,3,6,7]<4,2,2,2,3,2>6-6-5
6-Z6[0,1,2,5,6,7]<4,2,1,2,4,2>61-6-Z386-Z38
6-7[0,1,2,6,7,8]<4,2,0,2,4,3>622-6-7
6-8[0,2,3,4,5,7]<3,4,3,2,3,0>61-6-8
6-9[0,1,2,3,5,7]<3,4,2,2,3,1>6-6-9
6-Z10[0,1,3,4,5,7]<3,3,3,3,2,1>6-6-Z396-Z39
6-Z11[0,1,2,4,5,7]<3,3,3,2,3,1>6-6-Z406-Z40
6-Z12[0,1,2,4,6,7]<3,3,2,2,3,2>6-6-Z416-Z41
6-Z13[0,1,3,4,6,7]<3,2,4,2,2,2>61-6-Z426-Z42
6-14[0,1,3,4,5,8]<3,2,3,4,3,0>6-6-14
6-15[0,1,2,4,5,8]<3,2,3,4,2,1>6-6-15
6-16[0,1,4,5,6,8]<3,2,2,4,3,1>6-6-16
6-Z17[0,1,2,4,7,8]<3,2,2,3,3,2>6-6-Z436-Z43
6-18[0,1,2,5,7,8]<3,2,2,2,4,2>6-6-18
6-Z19[0,1,3,4,7,8]<3,1,3,4,3,1>6-6-Z446-Z44
6-20[0,1,4,5,8,9]<3,0,3,6,3,0>644Hexatonic scale, Augmented scale6-20
6-21[0,2,3,4,6,8]<2,4,2,4,1,2>6-6-21
6-22[0,1,2,4,6,8]<2,4,1,4,2,2>6-6-22
6-Z23[0,2,3,5,6,8]<2,3,4,2,2,2>61-6-Z456-Z45
6-Z24[0,1,3,4,6,8]<2,3,3,3,3,1>6-6-Z466-Z46
6-Z25[0,1,3,5,6,8]<2,3,3,2,4,1>6-6-Z476-Z47
6-Z26[0,1,3,5,7,8]<2,3,2,3,4,1>61-6-Z486-Z48
6-27[0,1,3,4,6,9]<2,2,5,2,2,2>6-6-27
6-Z28[0,1,3,5,6,9]<2,2,4,3,2,2>61-6-Z496-Z49
6-Z29[0,2,3,6,7,9]<2,2,4,2,3,2>61-6-Z506-Z50
6-30[0,1,3,6,7,9]<2,2,4,2,2,3>62Petrushka chord6-30
6-31[0,1,4,5,7,9]<2,2,3,4,3,1>6-6-31
6-32[0,2,4,5,7,9]<1,4,3,2,5,0>61Diatonic hexachord, Major hexachord6-32
6-33[0,2,3,5,7,9]<1,4,3,2,4,1>6Dorian hexachord6-33
6-34[0,1,3,5,7,9]<1,4,2,4,2,2>6Mystic chord, Prometheus scale6-34
6-35[0,2,4,6,8,10]<0,6,0,6,0,3>666Whole-tone scale6-35
6-Z36[0,1,2,3,4,7]<4,3,3,2,2,1>6-6-Z36-Z3
6-Z37[0,1,2,3,4,8]<4,3,2,3,2,1>61-6-Z46-Z4
6-Z38[0,1,2,3,7,8]<4,2,1,2,4,2>61-6-Z66-Z6
6-Z39[0,2,3,4,5,8]<3,3,3,3,2,1>6-6-Z106-Z10
6-Z40[0,1,2,3,5,8]<3,3,3,2,3,1>6-6-Z116-Z11
6-Z41[0,1,2,3,6,8]<3,3,2,2,3,2>6-6-Z126-Z12
6-Z42[0,1,2,3,6,9]<3,2,4,2,2,2>61-6-Z136-Z13
6-Z43[0,1,2,5,6,8]<3,2,2,3,3,2>6-6-Z176-Z17
6-Z44[0,1,2,5,6,9]<3,1,3,4,3,1>6-6-Z196-Z19
6-Z45[0,2,3,4,6,9]<2,3,4,2,2,2>61-6-Z236-Z23
6-Z46[0,1,2,4,6,9]<2,3,3,3,3,1>6-6-Z246-Z24
6-Z47[0,1,2,4,7,9]<2,3,3,2,4,1>6-6-Z256-Z25
6-Z48[0,1,2,5,7,9]<2,3,2,3,4,1>61-6-Z266-Z26
6-Z49[0,1,3,4,7,9]<2,2,4,3,2,2>61-6-Z286-Z28
6-Z50[0,1,4,6,7,9]<2,2,4,2,3,2>61-6-Z296-Z29
7-1[0,1,2,3,4,5,6]<6,5,4,3,2,1>71Chromatic heptachord5-1
7-2[0,1,2,3,4,5,7]<5,5,4,3,3,1>7-5-2
7-3[0,1,2,3,4,5,8]<5,4,4,4,3,1>7-5-3
7-4[0,1,2,3,4,6,7]<5,4,4,3,3,2>7-5-4
7-5[0,1,2,3,5,6,7]<5,4,3,3,4,2>7-5-5
7-6[0,1,2,3,4,7,8]<5,3,3,4,4,2>7-5-6
7-7[0,1,2,3,6,7,8]<5,3,2,3,5,3>7-5-7
7-8[0,2,3,4,5,6,8]<4,5,4,4,2,2>71-5-8
7-9[0,1,2,3,4,6,8]<4,5,3,4,3,2>7-5-9
7-10[0,1,2,3,4,6,9]<4,4,5,3,3,2>7-5-10
7-11[0,1,3,4,5,6,8]<4,4,4,4,4,1>7-5-11
7-Z12[0,1,2,3,4,7,9]<4,4,4,3,4,2>71-7-Z365-Z12
7-13[0,1,2,4,5,6,8]<4,4,3,5,3,2>7-5-13
7-14[0,1,2,3,5,7,8]<4,4,3,3,5,2>7-5-14
7-15[0,1,2,4,6,7,8]<4,4,2,4,4,3>71-5-15
7-16[0,1,2,3,5,6,9]<4,3,5,4,3,2>7-5-16
7-Z17[0,1,2,4,5,6,9]<4,3,4,5,4,1>71-7-Z375-Z17
7-Z18[0,1,4,5,6,7,9]<4,3,4,4,4,2>7-7-Z385-Z18
7-19[0,1,2,3,6,7,9]<4,3,4,3,4,3>7-5-19
7-20[0,1,2,5,6,7,9]<4,3,3,4,5,2>7-5-20
7-21[0,1,2,4,5,8,9]<4,2,4,6,4,1>7-5-21
7-22[0,1,2,5,6,8,9]<4,2,4,5,4,2>71Hungarian major, Double harmonic5-22
7-23[0,2,3,4,5,7,9]<3,5,4,3,5,1>7-5-23
7-24[0,1,2,3,5,7,9]<3,5,3,4,4,2>7-5-24
7-25[0,2,3,4,6,7,9]<3,4,5,3,4,2>7-5-25
7-26[0,1,3,4,5,7,9]<3,4,4,5,3,2>7-5-26
7-27[0,1,2,4,5,7,9]<3,4,4,4,5,1>7-5-27
7-28[0,1,3,5,6,7,9]<3,4,4,4,3,3>7-5-28
7-29[0,1,2,4,6,7,9]<3,4,4,3,5,2>7-5-29
7-30[0,1,2,4,6,8,9]<3,4,3,5,4,2>7-5-30
7-31[0,1,3,4,6,7,9]<3,3,6,3,3,3>7Hungarian minor5-31
7-32[0,1,3,4,6,8,9]<3,3,5,4,4,2>7Harmonic minor, Harmonic major5-32
7-33[0,1,2,4,6,8,10]<2,6,2,6,2,3>71Neapolitan major5-33
7-34[0,1,3,4,6,8,10]<2,5,4,4,4,2>71Melodic minor ascending, Jazz minor5-34
7-35[0,1,3,5,6,8,10]<2,5,4,3,6,1>71Major scale, Diatonic scale, Ionian5-35
7-Z36[0,1,2,3,5,6,8]<4,4,4,3,4,2>7-7-Z125-Z36
7-Z37[0,1,3,4,5,7,8]<4,3,4,5,4,1>71-7-Z175-Z37
7-Z38[0,1,2,4,5,7,8]<4,3,4,4,4,2>7-7-Z185-Z38
8-1[0,1,2,3,4,5,6,7]<7,6,5,4,4,2>81Chromatic octachord4-1
8-2[0,1,2,3,4,5,6,8]<6,6,5,5,4,2>8-4-2
8-3[0,1,2,3,4,5,6,9]<6,5,6,5,4,2>81-4-3
8-4[0,1,2,3,4,5,7,8]<6,5,5,5,5,2>8-4-4
8-5[0,1,2,3,4,6,7,8]<6,5,4,5,5,3>8-4-5
8-6[0,1,2,3,5,6,7,8]<6,5,4,4,6,3>81-4-6
8-7[0,1,2,3,4,5,8,9]<6,4,5,6,5,2>81-4-7
8-8[0,1,2,3,4,7,8,9]<6,4,4,5,6,3>81-4-8
8-9[0,1,2,3,6,7,8,9]<6,4,4,4,6,4>822-4-9
8-10[0,2,3,4,5,6,7,9]<5,6,6,4,5,2>81-4-10
8-11[0,1,2,3,4,5,7,9]<5,6,5,5,5,2>8-4-11
8-12[0,1,3,4,5,6,7,9]<5,5,6,5,4,3>8-4-12
8-13[0,1,2,3,4,6,7,9]<5,5,6,4,5,3>8-4-13
8-14[0,1,2,4,5,6,7,9]<5,5,5,5,6,2>8-4-14
8-Z15[0,1,2,3,4,6,8,9]<5,5,5,5,5,3>8-8-Z294-Z15
8-16[0,1,2,3,5,7,8,9]<5,5,4,5,6,3>8-4-16
8-17[0,1,3,4,5,6,8,9]<5,4,6,6,5,2>81-4-17
8-18[0,1,2,3,5,6,8,9]<5,4,6,5,5,3>8-4-18
8-19[0,1,2,4,5,6,8,9]<5,4,5,7,5,2>8-4-19
8-20[0,1,2,4,5,7,8,9]<5,4,5,6,6,2>81-4-20
8-21[0,1,2,3,4,6,8,10]<4,7,4,6,4,3>81-4-21
8-22[0,1,2,3,5,6,8,10]<4,6,5,5,6,2>8-4-22
8-23[0,1,2,3,5,7,8,10]<4,6,5,4,7,2>81-4-23
8-24[0,1,2,4,5,6,8,10]<4,6,4,7,4,3>81-4-24
8-25[0,1,2,4,6,7,8,10]<4,6,4,6,4,4>822-4-25
8-26[0,1,3,4,5,7,8,10]<4,5,6,5,6,2>81-4-26
8-27[0,1,2,4,5,7,8,10]<4,5,6,5,5,3>8-4-27
8-28[0,1,3,4,6,7,9,10]<4,4,8,4,4,4>844Octatonic scale, Diminished scale4-28
8-Z29[0,1,2,3,5,6,7,9]<5,5,5,5,5,3>8-8-Z154-Z29
9-1[0,1,2,3,4,5,6,7,8]<8,7,6,6,6,3>91Chromatic nonachord3-1
9-2[0,1,2,3,4,5,6,7,9]<7,7,7,6,6,3>9-3-2
9-3[0,1,2,3,4,5,6,8,9]<7,6,7,7,6,3>9-3-3
9-4[0,1,2,3,4,5,7,8,9]<7,6,6,7,7,3>9-3-4
9-5[0,1,2,3,4,6,7,8,9]<7,6,6,6,7,4>9-3-5
9-6[0,1,2,3,4,5,6,8,10]<6,8,6,7,6,3>91-3-6
9-7[0,1,2,3,4,5,7,8,10]<6,7,7,6,7,3>9-3-7
9-8[0,1,2,3,4,6,7,8,10]<6,7,6,7,6,4>9-3-8
9-9[0,1,2,3,5,6,7,8,10]<6,7,6,6,8,3>91-3-9
9-10[0,1,2,3,4,6,7,9,10]<6,6,8,6,6,4>91-3-10
9-11[0,1,2,3,5,6,7,9,10]<6,6,7,7,7,3>9-3-11
9-12[0,1,2,4,5,6,8,9,10]<6,6,6,9,6,3>933-3-12
10-1[0,1,2,3,4,5,6,7,8,9]<9,8,8,8,8,4>101Chromatic decachord2-1
10-2[0,1,2,3,4,5,6,7,8,10]<8,9,8,8,8,4>101-2-2
10-3[0,1,2,3,4,5,6,7,9,10]<8,8,9,8,8,4>101-2-3
10-4[0,1,2,3,4,5,6,8,9,10]<8,8,8,9,8,4>101-2-4
10-5[0,1,2,3,4,5,7,8,9,10]<8,8,8,8,9,4>101-2-5
10-6[0,1,2,3,4,6,7,8,9,10]<8,8,8,8,8,5>1022-2-6
11-1[0,1,2,3,4,5,6,7,8,9,10]<10,10,10,10,10,5>111Chromatic undecachord, All but one1-1
12-1[0,1,2,3,4,5,6,7,8,9,10,11]<12,12,12,12,12,6>121212Chromatic scale, Aggregate, Total chromatic0-1

T-Sym: Transpositional symmetry (how many transpositions map the set to itself)

I-Sym: Inversional symmetry (how many inversions map the set to itself)

Z-Mate: Z-related set class (same interval vector, different prime form)