Garibaldi

Revision as of 02:47, 3 June 2021 by FloraC (talk | contribs) (Improve interval table)

Garibaldi temperament is a 7-limit (and higher) temperament of the schismatic family. It is an extension of helmholtz temperament beyond the 5-limit but with the same simple chain-of-fifths structure (so that standard notation may be used). As in helmholtz temperament, 5/4 is mapped to the diminished fourth (e.g. A-Db), and the new mapping specific to garibaldi is that 7/4 is mapped to the double diminished octave (e.g. A-Abb). This makes garibaldi a marvel temperament.

Immediate 11-limit extensions include cassandra (41&53), mapping 11/8 to +23 steps, andromeda (29&41), mapping 11/8 to -18 steps, and helenus (53&65d), mapping 11/8 to -30 steps.

Interval chain

In the following table, prime harmonics are in bold.

# Cents* Approximate Ratios
7-limit 13-limit Extension
Cassandra Mapping
13-limit Extension
Andromeda Mapping
13-limit Extension
Helenus Mapping
0 0.0 1/1
1 702.1 3/2
2 204.2 9/8
3 906.3 27/16, 42/25 22/13 22/13 22/13
4 408.3 63/50, 80/63 14/11
5 1110.4 40/21 21/11
6 612.5 10/7
7 114.6 15/14, 16/15 14/13
8 816.7 8/5 21/13
9 318.8 6/5 40/33
10 1020.9 9/5 20/11
11 522.9 27/20 15/11
12 25.0 50/49, 64/63, 81/80 40/39, 45/44
13 727.1 32/21 20/13
14 229.2 8/7 15/13
15 931.3 12/7
16 433.4 9/7 14/11
17 1135.4 27/14, 48/25 52/27 64/33 21/11
18 637.5 36/25, 81/56 13/9 16/11
19 139.6 27/25 13/12 12/11 14/13
20 841.7 80/49, 81/50 13/8, 44/27 18/11, 64/39 21/13
21 343.8 60/49 11/9, 39/32 16/13, 27/22 40/33
22 1045.9 64/35 11/6 24/13 20/11
23 548.0 48/35 11/8 18/13 15/11
24 50.0 36/35 33/32 27/26 40/39, 45/44
25 752.1 54/35 20/13
26 254.2 81/70, 144/125 15/13
27 956.3 216/125, 256/147 26/15
28 458.4 64/49 13/10
29 1160.5 96/49 39/20, 88/45 64/33

* in 7-limit POTE tuning

Scales

Spectrum of garibaldi tunings by eigenmonzos

Eigenmonzo Fifth Comments
16/15 701.676
(69\118) 701.695
5/4 701.711
[0 -10 17 701.728 5-odd-limit least squares
6/5 701.738 5-odd-limit minimax
100\171 701.754
10/9 701.760
(31\53) 701.887
15/13 701.9355
13/10 701.9362
4/3 701.955
16/13 702.026
13/12 702.030
18/13 702.034
86\147 702.041
11/10 702.097
15/11 702.102
14/13 702.109 13- and 15-odd-limit minimax
[0 -95 -137 -129 167 143 702.112 15-odd-limit least squares
[0 -27 7 17 702.114 9-odd-limit least squares
(55\94) 702.12766
[0 -38 -80 -122 137 116 702.12770 13-odd-limit least squares
[0 -25 11 35 702.140 7-odd-limit least squares
[0 17 -52 -88 134 702.183 11-odd-limit least squares
9/7 702.193 9- and 11-odd-limit minimax
7/6 702.209 7-odd-limit minimax
(79\135) 702.222
8/7 702.227
14/11 702.230
11/8 702.231
12/11 702.244
11/9 702.258
(24\41) 702.439
15/14 702.778
7/5 702.915
(17\29) 703.448
13/11 703.597

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