Blackcomb

Blackcomb is a 5/3-repeating regular temperament that tempers out 250/243 in the 5-limit, the amount by which three 3/2's exceed 5/4. This implies a generator of a Blackwood-like sharp fifth which is quite "dirty" but still recognizable. It possesses MOS scales of the form 1L 3s<5/3>, 1L 4s<5/3>, making it an antidiatonic tuning, 5L 1s<5/3>, and 6L 5s<5/3>. 16ed5/3 is one of the best tunings for this temperament that is not extremely close to an EDO.

Interval chain (CTE tuning)

Generators up	Cents
0	0.0
1	728.8
2	573.2
3	417.6
4	262.0
5	106.4
6	835.2
7	679.6
8	524.0
9	368.4
10	212.8

Chords

Blackcomb is structured on 4:5:6 triads like octave-repeating meantone temperament. However, because Blackcomb is a much less accurate temperament, the major third and perfect fifth are usually tuned very sharp, with the major third often being closer to 9/7 than 5/4.

Temperament data

Subgroup: 5/3.2.3

Comma list: 250/243

Mapping: [⟨1 -2 -2], ⟨0 3 4]]

CTE generator: ~3/2 = 728.763