Dicot
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- "Dicot" redirects here. For the ploidacot signature, see Ploidacot/Dicot.
Dicot is an exotemperament that tempers out 25/24. It is also the first fully prototypical dicot temperament. It tempers 6/5 and 5/4 into the same neutral third interval, which, when the fifth is tuned pure, is sqrt(3/2). It is useful to represent the structure of 5-limit harmonies without fully representing them in its greater accuracy.
It can be extended by tempering out 15/14 and 36/35 in the 7-limit, though this could turn the 3L 4s mos into a 4L 3s mos. This makes 7/6 and 9/7 equated to the neutral third, viewing 6:7:9 as a tertian chord.
Another notable extension of dicot is decimal, which splits the octave in two for 7/5~10/7 by tempering out 50/49, and equates 7/6 and 8/7 to the tritone complement of 5/4~6/5, neutralizing the 6:7:8 chord as well. This represents the structure of 7-limit harmonies in a way that is not based on tertian harmony and a heptatonic system, but rather a decatonic one.
For technical data, see Dicot family #Dicot.
Interval chain
In the following table, odd harmonics 1–9 are labeled in bold.
| # | Cents* | Approximate ratios |
|---|---|---|
| 0 | 0.0 | 1/1 |
| 1 | 351.1 | 5/4, 6/5 |
| 2 | 702.2 | 3/2 |
| 3 | 1053.3 | 9/5, 15/8 |
| 4 | 204.3 | 9/8 |
* In 5-limit CWE tuning