User:CompactStar/RST notation: Difference between revisions
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== Formal commas == | == Formal commas == | ||
{| class="wikitable center-all" | {| class="wikitable center-all" | ||
! Prime limit | ! Prime limit | ||
! Formal comma | ! Formal comma | ||
Revision as of 04:57, 25 August 2024
RST notation is a notation mainly for just intonation (although it also can work in JI-based regular temperaments) that was devised by CompactStar. It is an extension of 3-limit chain-of-fifths notation where prefixes are added to convey higher-limit commatic alterations. The prefixes used are "ruper-"/"rub-" for the 5-limit formal comma 81/80, "super-"/"sub-" for the 7-limit formal comma 64/63, "tuper-"/"tub-" for the 11-limit formal comma 33/32, etc., going through a rotated version of the alphabet (RSTUVWXYZABCDEFGHIJKLMNOPQ). These may be abbreviated as R/r, S/s, T/t, etc. This is a generalization of the usage of super-/sub- for 64/63 which has existing precedent like in "subminor 7th" for 7/4. Diphthongs have the second vowel removed for ease of pronunciation (for example "iuper-"/"iub-" becomes "iper-"/"ib-") and "cuper-"/"cub-" is modified to "chuper-"/"chub-" to reduce ambiguity with K and S. This system reaches up to the 107-limit with the final prefix pair of "quper-"/"qub-" modifying by 108/107.
Formal commas
| Prime limit | Formal comma | Prefix set |
|---|---|---|
| 5 | 81/80 | ruper-/rub- |
| 7 | 64/63 | super-/sub- |
| 11 | 33/32 | tuper-/tub- |
| 13 | 1053/1024 | uper-/ub- |
| 17 | 4131/4096 | vuper-/vub- |
| 19 | 513/512 | wuper-/wub- |
| 23 | 736/729 | xuper-/xub- |
| 29 | 261/256 | yuper-/yub- |
| 31 | 248/243 | zuper-/zub- |
| 37 | 37/36 | aper-/ab- |
| 41 | 82/81 | buper-/bub- |