Electra
WIP Electra is a tritave-based rank-2 temperament in the 3.5.11.13 subgroup, with a generator near 15/11 or it's tritave complement 11/5. The name was given by CompactStar in analogy to the Sirius, Arcturus, and Canopus star names used for other tritave temperaments. It tempers out the commas 1875/1859 and 14641/14625, with the latter being the amount by which 3 11/5's exceed 117/11. It possesses MOS scales of the families 4L 3s<3/1>, 7L 4s<3/1>, and 7L 11s<3/1>.
Intervals
In 7-note MOS
Here, "major" quality is used for intervals in the mode 5|1 and "minor" quality is used for intervals in the mode 1|5.
| Interval name | Abbrevation | Cents (18edt) |
|---|---|---|
| Perfect unison | P0ms | 0.000 |
| Diminished mosstep | D1ms | 0.000 |
| Minor mosstep | m1ms | 211.328 |
| Major mosstep | M1ms | 316.993 |
| Augmented mosstep | A1ms | 422.657 |
| Diminshed 2-mosstep | 422.657 | |
| Perfect 2-mosstep | 528.321 | |
| Augmented 2-mosstep | 633.985 | |
| Diminished 3-mosstep | 633.985 | |
| Minor 3-mosstep | 739.649 | |
| Major 3-mosstep | 845.313 | |
| Augmented 3-mosstep | 950.978 | |
| Diminished 4-mosstep | 950.978 | |
| Minor 4-mosstep | 1056.642 | |
| Major 4-mosstep | 1162.306 | |
| Augmented 4-mosstep | 1267.970 | |
| Diminished 5-mosstep | 1267.970 | |
| Perfect 5-mosstep | 1373.634 |
Chords
The 11:13:15 triad is a characteristic feature of many Electra scales, and has been suggeested by CompactStar as a fundamental sonority for no-2's music, due to being relatively consonant compared to other no-2's chords. There is als a "minor" version of this triad, 143:165:195.