WIP

Ed11/5 is division of of the neutral ninth (11/5) into n equal parts.

Division of 11/5 into equal parts can be conceived of as to directly use this interval as an equivalence, or not. The question of equivalence has not even been posed yet. The utility of 11/5 as a base though is apparent by it being the best option for "no-twos-or-threes" harmony after the extremely wide pentave, as well as it being a relatively strong consonance.

The simplest chord that is possible without 2's or 3's that fits in 11/5 is 7:11:13, so this can be viewed as the fundamental sonority of no-twos-or-threes music. It is also the only simple option that is not extremely dissonant aside from 11:13:17.