Resource
Chords
Sets of notes played together to create a new sound.

All chords presented here are in:
Dyad

Major Third

2 notes
Short Name
Ratio 4:5
Intervals P1 - M3
P1
M3

Minor Third

2 notes
Short Name
Ratio 5:6
Intervals P1 - m3
P1
m3

Perfect Fourth

2 notes
Short Name
Ratio 3:4
Intervals P1 - P4
P1
P4

Major Second

2 notes
Short Name
Ratio 8:9
Intervals P1 - M2
P1
M2

Tritone

2 notes
Short Name
Ratio 18:25
Intervals P1 - TT
P1
TT

Minor Second

2 notes
Short Name
Ratio 15:16
Intervals P1 - m2
P1
m2

Power

2 notes
Short Name 5
Ratio 2:3
Intervals P1 - P5
P1
P5

Minor Sixth

2 notes
Short Name
Ratio 5:8
Intervals P1 - m6
P1
m6

Major Sixth

2 notes
Short Name
Ratio 3:5
Intervals P1 - M6
P1
M6

Minor Seventh

2 notes
Short Name
Ratio 5:9
Intervals P1 - m7
P1
m7

Major Seventh

2 notes
Short Name
Ratio 8:15
Intervals P1 - M7
P1
M7
Triad

Major

3 notes
Short Name maj
Ratio 4:5:6
Intervals P1 - M3 - P5
P1
M3
P5

Major2nd

3 notes
Short Name maj
Ratio 3:4:5
Intervals P1 - P4 - M6
P1
P4
M6

Minor

3 notes
Short Name min
Ratio 10:12:15
Intervals P1 - m3 - P5
P1
m3
P5

Minor2nd

3 notes
Short Name
Ratio 15:20:24
Intervals P1 - P4 - m6
P1
P4
m6

Diminished

3 notes
Short Name dim
Ratio 90:108:125
Intervals P1 - m3 - TT
P1
m3
TT

Diminished2nd

3 notes
Short Name
Ratio 18:25:30
Intervals P1 - TT - M6
P1
TT
M6

Suspended 4th

3 notes
Short Name sus4
Ratio 6:8:9
Intervals P1 - P4 - P5
P1
P4
P5

Suspended 2nd

3 notes
Short Name sus2
Ratio 8:9:12
Intervals P1 - M2 - P5
P1
M2
P5

Augmented

3 notes
Short Name aug
Ratio 20:25:32
Intervals P1 - M3 - m6
P1
M3
m6

Minor Major 7th

3 notes
Short Name minMaj7
Ratio 36:45:50
Intervals P1 - M3 - TT
P1
M3
TT

Augmented Suspended 2nd

3 notes
Short Name aug(sus2)
Ratio 40:45:64
Intervals P1 - M2 - m6
P1
M2
m6

Minor 11

3 notes
Short Name m11
Ratio 24:27:32
Intervals P1 - M2 - P4
P1
M2
P4

Major 6/9

3 notes
Short Name Maj6/9
Ratio 15:18:20
Intervals P1 - m3 - P4
P1
m3
P4

Lydian Chord

3 notes
Short Name Lyd
Ratio 24:32:45
Intervals P1 - P4 - M7
P1
P4
M7

Suspended 2nd

3 notes
Short Name sus2
Ratio 72:100:135
Intervals P1 - TT - M7
P1
TT
M7

Quartal Cluster

3 notes
Short Name QC
Ratio 8:9:10
Intervals P1 - M2 - M3
P1
M2
M3

Full Power

3 notes
Short Name
Ratio 2:3:4
Intervals P1 - P5 - P8
P1
P5
P8

Full Power

3 notes
Short Name 5^
Ratio 2:2:3
Intervals P1 - P1 - P5
P1
P1
Tetrad

Major Seventh

4 notes
Short Name M7
Ratio 8:10:12:15
Intervals P1 - M3 - P5 - M7
P1
M3
P5
M7

Major Seventh 2nd

4 notes
Short Name M7
Ratio 12:15:16:20
Intervals P1 - M3 - P4 - M6
P1
M3
P4
M6

Major Seventh 3rd

4 notes
Short Name M7
Ratio 15:16:20:24
Intervals -m2 - P1 - M3 - P5
-m2
P1
M3

Minor Seventh

4 notes
Short Name m7
Ratio 10:12:15:18
Intervals P1 - m3 - P5 - m7
P1
m3
P5
m7

Minor Major 7th

4 notes
Short Name minMaj7
Ratio 12:15:18:20
Intervals P1 - M3 - P5 - M6
P1
M3
P5
M6

Major 6th

4 notes
Short Name maj6
Ratio 15:18:20:24
Intervals P1 - m3 - P4 - m6
P1
m3
P4
m6

Dominant 7th Add9

4 notes
Short Name 9
Ratio 24:27:32:40
Intervals P1 - M2 - P4 - M6
P1
M2
P4
M6

Major Seventh

4 notes
Short Name M7
Ratio 20:25:30:36
Intervals P1 - M3 - P5 - m7
P1
M3
P5
m7

Minor 9th

4 notes
Short Name min9
Ratio 90:108:125:144
Intervals P1 - m3 - TT - m6
P1
m3
TT
m6

Major Add11

4 notes
Short Name maj(add11)
Ratio 15:18:20:25
Intervals P1 - m3 - P4 - M6
P1
m3
P4
M6

Minor 11th

4 notes
Short Name min11
Ratio 72:81:100:120
Intervals P1 - M2 - TT - M6
P1
M2
TT
M6

Minor 13th

4 notes
Short Name min13
Ratio 90:108:125:162
Intervals P1 - m3 - TT - m7
P1
m3
TT
m7

Major 11th

4 notes
Short Name maj11
Ratio 30:36:45:50
Intervals P1 - m3 - P5 - M6
P1
m3
P5
M6

Minor Major 11th

4 notes
Short Name minMaj11
Ratio 36:45:50:60
Intervals P1 - M3 - TT - M6
P1
M3
TT
M6

Major 13th

4 notes
Short Name maj13
Ratio 120:135:160:192
Intervals P1 - M2 - P4 - m6
P1
M2
P4
m6

Minor 11th (no 9)

4 notes
Short Name min11(no9)
Ratio 12:15:20:27
Intervals P1 - M3 - M6 - M9
P1
M3
M6
M9

Major 11th (no 9)

4 notes
Short Name maj11(no9)
Ratio 15:20:24:27
Intervals P1 - P4 - m6 - m7
P1
P4
m6
m7

Dominant 7(♯11)

4 notes
Short Name 7♯11
Ratio 30:36:40:45
Intervals P1 - m3 - P4 - P5
P1
m3
P4
P5

Dominant 13th

4 notes
Short Name 13
Ratio 64:72:81:108
Intervals -M2 - P1 - M2 - P5
-M2
P1
M2

Dominant 7(♭9)

4 notes
Short Name 7♭9
Ratio 60:80:108:135
Intervals P1 - P4 - m7 - M9
P1
P4
m7
M9

Suspended 2nd/4th

4 notes
Short Name sus2/4
Ratio 6:8:9:10
Intervals P1 - P4 - P5 - M6
P1
P4
P5
M6

Half-Diminished 7th

4 notes
Short Name m7♭5
Ratio 8:9:10:12
Intervals P1 - M2 - M3 - P5
P1
M2
M3
P5

Dominant 7(♭13)

4 notes
Short Name 7♭13
Ratio 40:45:54:72
Intervals -M2 - P1 - m3 - m6
-M2
P1
m3

Major 13th (no 11)

4 notes
Short Name maj13(no11)
Ratio 15:20:27:36
Intervals P1 - P4 - m7 - m10
P1
P4
m7
m10

Dominant 9(♭13)

4 notes
Short Name 9♭13
Ratio 30:40:45:54
Intervals P1 - P4 - P5 - m7
P1
P4
P5
m7

Dominant 9(♯11)

4 notes
Short Name 9♯11
Ratio 24:27:32:36
Intervals P1 - M2 - P4 - P5
P1
M2
P4
P5

Minor 11th

4 notes
Short Name min11
Ratio 20:24:27:36
Intervals -m3 - P1 - M2 - P5
-m3
P1
M2

Minor Major 11th

4 notes
Short Name minMaj11
Ratio 12:16:20:27
Intervals P1 - P4 - M6 - M9
P1
P4
M6
M9

Dominant 13(♭9)

4 notes
Short Name 13♭9
Ratio 80:90:108:135
Intervals -M2 - P1 - m3 - P5
-M2
P1
m3

Major 13th

4 notes
Short Name maj13
Ratio 40:48:60:75
Intervals P1 - m3 - P5 - M7
P1
m3
P5
M7

Minor Major 13th

4 notes
Short Name minMaj13
Ratio 60:75:96:100
Intervals P1 - M3 - m6 - M6
P1
M3
m6
M6

Dominant 13(♯11)

4 notes
Short Name 13♯11
Ratio 60:75:80:96
Intervals P1 - M3 - P4 - m6
P1
M3
P4
m6

Augmented Major 7th

4 notes
Short Name augM7
Ratio 60:64:75:96
Intervals P1 - m2 - M3 - m6
P1
m2
M3
m6

Augmented Major 9th

4 notes
Short Name augM9
Ratio 40:50:64:75
Intervals P1 - M3 - m6 - M7
P1
M3
m6
M7

Augmented 7th

4 notes
Short Name aug7
Ratio 20:25:30:32
Intervals P1 - M3 - P5 - m6
P1
M3
P5
m6

Augmented Major 7th

4 notes
Short Name augM7
Ratio 20:24:25:32
Intervals P1 - m3 - M3 - m6
P1
m3
M3
m6

Major 9th (no 7)

4 notes
Short Name maj9(no7)
Ratio 15:16:20:25
Intervals P1 - m2 - P4 - M6
P1
m2
P4
M6

Minor 11th

4 notes
Short Name min11
Ratio 90:108:125:150
Intervals P1 - m3 - TT - M6
P1
m3
TT
M6

Augmented Seventh

4 notes
Short Name
Ratio 20:25:32:36
Intervals P1 - M3 - m6 - m7
P1
M3
m6
m7

Diminished Major Seventh

4 notes
Short Name
Ratio 360:432:500:675
Intervals P1 - m3 - TT - M7
P1
m3
TT
M7