This is perceptually indistinguishable from septimal meantone temperament. Many chords of 31-ET are discussed in the article on septimal meantone temperament. Asimov, who reveals himself to have the same electrical septimal powers as Gunvolt. This system is a "mirror image" of septimal meantone in many ways. The septimal major triad can also be represented by the ratio 14&colon;18&colon;21. The septimal kleisma and the septimal semicomma are smaller septimal commas. Hence C-A, not C-B, represents a 7&colon;4 interval in septimal meantone. It tempers out the septimal comma but not the syntonic comma. This chord might be called the "septimal semicomma diminished seventh". Septimal meantone can be extended to the 11-limit, but not uniquely. The septimal major sixth, 12/7, is the inverse of this interval. Also the septimal subminor third (7/6) is different from the minor third (6/5). The difference between these two is the septimal sixth tone (50&colon;49, 34.98 cents) .