27:32:40:48
Chord information |
27:32:40:48 is a minor seventh chord found on the ii (5⁄4) of Ptolemy's intense diatonic scale (Zarlino), perhaps the most common 5-limit diatonic.
It is the only seventh chord in the diatonic scale to contain both a 40/27 grave fifth and a 3/2 perfect fifth.