5:6:7:9
| Chord information |
5:6:7:9 is a concordant 7-limit interpretation of the half-diminished seventh chord. It can be thought of as the rootless version of the harmonic ninth chord, 4:5:6:7:9. It is found in the Ringer 5 scale. See also its homonym 6:7:9:10, a minor-major sixth chord.
In archytas temperament, this chord is tempered together with 45:54:64:81.