4:5:7, the fifthless harmonic seventh chord, is a 7-limit chord found as a subset of the harmonic seventh chord, 4:5:6:7. It is used as a tuning target for the Italian augmented sixth chord in septimal meantone.

Chord information
Harmonics 4:5:7
Subharmonics 1/(35:28:20)
Intervals from root 1/15/47/4
Cents from root 386¢969¢
Step intervals 5/4, 7/5
Step cents 386¢, 583¢
Color names yo zo-7 no-5 or y,z7no5
har-7 no-5 or h7no5
Prime limit 7
Genus 57 (35)
Intervallic odd limit 7
Otonal odd limit 7
Utonal odd limit 35
Consistent edos (d ≥ 2) 6edo*, 10edo*, 16edo*, 21edo*, …

The open voicing 4:7:10 may be used as a fundamental otonal consonance of the 2.5.7 subgroup. It inverts to 14:20:35 with the middle voice contrasting by 49/40.

Rotations around the octave

4:5:7 "Root position"
5:7:8 "1st inversion"
7:8:10 "2nd inversion"


Edo approximations for 4:5:7 
intervals: 5/4, 7/4 · ≤ 60edo, RMS rel. error ≤ 15%
  Edo Steps Cents (¢) Absolute errors (¢) RMS (¢) RMS (%)
6 0  2  5 0.00 400.00 1000.00 0.00 +13.69 +31.17 12.76 6.38
10 0  3  8 0.00 360.00  960.00 0.00 -26.31  -8.83 10.93 9.11
12 0  4 10 0.00 400.00 1000.00 0.00 +13.69 +31.17 12.76 12.76
15 0  5 12 0.00 400.00  960.00 0.00 +13.69  -8.83 9.26 11.58
16 0  5 13 0.00 375.00  975.00 0.00 -11.31  +6.17 7.24 9.66
19 0  6 15 0.00 378.95  947.37 0.00  -7.37 -21.46 8.90 14.10
21 0  7 17 0.00 400.00  971.43 0.00 +13.69  +2.60 5.93 10.38
22 0  7 18 0.00 381.82  981.82 0.00  -4.50 +12.99 7.41 13.59
25 0  8 20 0.00 384.00  960.00 0.00  -2.31  -8.83 3.74 7.78
27 0  9 22 0.00 400.00  977.78 0.00 +13.69  +8.95 5.68 12.77
31 0 10 25 0.00 387.10  967.74 0.00  +0.78  -1.08 0.77 1.98
35 0 11 28 0.00 377.14  960.00 0.00  -9.17  -8.83 4.24 12.38
37 0 12 30 0.00 389.19  972.97 0.00  +2.88  +4.15 1.73 5.35
41 0 13 33 0.00 380.49  965.85 0.00  -5.83  -2.97 2.38 8.13
43 0 14 35 0.00 390.70  976.74 0.00  +4.38  +7.92 3.24 11.61
46 0 15 37 0.00 391.30  965.22 0.00  +4.99  -3.61 3.53 13.52
47 0 15 38 0.00 382.98  970.21 0.00  -3.33  +1.39 1.98 7.76
52 0 17 42 0.00 392.31  969.23 0.00  +5.99  +0.40 2.74 11.85
53 0 17 43 0.00 384.91  973.58 0.00  -1.41  +4.76 2.64 11.65
56 0 18 45 0.00 385.71  964.29 0.00  -0.60  -4.54 2.01 9.40
58 0 19 47 0.00 393.10  972.41 0.00  +6.79  +3.59 2.77 13.40

Related chords

Chords related to this triad (5-limit except where noted):