Reserve more patterns that could be used for relative or absolute not…

…ation

Reserve all capital letters as pitch nominals.
Reserve all lowercase Greek letters as pitch nominals.
Reserve all relative intervals ending in 'ms' for MOS-steps.
Replace '=' with '_' as the natural ASCII accidental.
Bring back semiquartal nicknames as they can no longer be constructed in-language.
Add stubs for a Diamond mos system.

ref #308

documentation/advanced-dsl.md

@@ -393,9 +393,16 @@ C♮5 "Octave"
 ```
 
 #### Nicknames
-Lumi, the lead developer, likes to call "C + P4 / 2" "φ" or "phi". Its octave complement is called "ψ" or "psi" and "beta half-flat" has the nickname "χ" or "chi". The last interordinal would be "ω" or "ome(ga)" but it tends to jump around depending on the mood and if the semiquartal scale was sullied by adding a flat sign ♭ in the mix or not.
+The semifourth against C has a nickname "φ" or "phi". Other nicknames include:
 
-Absolute semiquartals might make a comeback as an opt-in, but for now they've been excluded from the main grammar.
+| Expression    | Standard | Nickname | ASCII  |
+| ------------- | -------- | -------- | ------ |
+| `C4 + P4 / 2` | `αd4`    | `φ4`     | `phi4` |
+| `C4 - P4 / 2` | `εd4`    | `ψ4`     | `psi4` |
+| `φ4 + M2`     | `βd4`    | `χ4`     | `chi4` |
+| `ψ4 + M2`     | `ζt4`    | `ω4`     | `ome4` |
+
+The scale C, D, φ, χ, F, G, A, ψ, ω, (C) is the 6|2 (*Stellerian*) mode of [5L 4s](https://en.xen.wiki/w/5L_4s) spellable without accidentals.
 
 ## Quarter-augmented Pythagorean notation
 As previously mentioned the fifth spans 4 degrees so we can split it again without breaking the ordinal notation.

examples/notation/10edo-neutral.sw

@@ -1,14 +1,14 @@
 "Recommended notation for 10 divisions of the octave"
-C=4 = mtof(60)
+C_4 = mtof(60)
 Dd4
-D=4
+D_4
 Ed4
-F=4
+F_4
 Gd4
-G=4
+G_4
 Ad4
 Bb4
 Bd4
-C=5
+C_5
 
 10@

examples/notation/10edo-pentanominal.sw

@@ -1,14 +1,14 @@
 "Recommended notation for 20 divisions of the octave"
 C♮4 = mtof(60)
 ^C4
-αd4  "φ♮4"
-^αd4 "^φ4"
+φ♮4
+^φ4
 F♮4
 ^F4
 G♮4
 ^G4
-εd4  "ψ♮4"
-^εd4 "^ψ4"
+ψ♮4
+^ψ4
 C♮5
 
 10@

examples/notation/11edo.sw

@@ -1,15 +1,15 @@
 "Recommended notation for 11 divisions of the octave"
-C=4 = mtof(60)
-D=4
-E=4
+C_4 = mtof(60)
+D_4
+E_4
 ^E4
 vF4
-F=4
-G=4
-A=4
-B=4
+F_4
+G_4
+A_4
+B_4
 ^B4
 vC5
-C=5
+C_5
 
 11@

examples/notation/12edo.sw

@@ -1,16 +1,16 @@
 "Recommended notation for 12 divisions of the octave"
-C=4 = mtof(60)
+C_4 = mtof(60)
 C#4
-D=4
+D_4
 Eb4
-E=4
-F=4
+E_4
+F_4
 F#4
-G=4
+G_4
 G#4
-A=4
+A_4
 Bb4
-B=4
-C=5
+B_4
+C_5
 
 12@

examples/notation/13edo-antidiatonic.sw

@@ -1,17 +1,17 @@
 "Recommended notation for 13 divisions of the octave"
-C=4 = mtof(60)
-D=4
-E=4
+C_4 = mtof(60)
+D_4
+E_4
 ^E4
 vvF4
 vF4
-F=4
-G=4
-A=4
-B=4
+F_4
+G_4
+A_4
+B_4
 ^B4
 ^^B4
 vC5
-C=5
+C_5
 
 13b@

examples/notation/13edo-archeotonic.sw

@@ -1,9 +1,9 @@
 "Recommended notation for 13 divisions of the octave"
-C=4 = mtof(60)
+C_4 = mtof(60)
 ^C4
-D=4
+D_4
 ^D4
-E=4
+E_4
 ^E4
 F#4
 ^F#4
@@ -12,6 +12,6 @@ Ab4
 vBb4
 Bb4
 vC5
-C=5
+C_5
 
 13@2.9

examples/notation/13edo-pentanominal.sw

@@ -1,17 +1,17 @@
 "Recommended notation for 13 divisions of the octave"
-C=4 = mtof(60)
+C_4 = mtof(60)
 ^C4
 vD4
-D=4
+D_4
 ^D4
-F=4
+F_4
 ^F4
 vG4
-G=4
+G_4
 ^G4
 vA4
-A=4
+A_4
 ^A4
-C=5
+C_5
 
 13@

examples/notation/17edo.sw

@@ -1,21 +1,21 @@
 "Recommended notation for 17 divisions of the octave"
-C=4 = mtof(60)
+C_4 = mtof(60)
 Ct4
 Dd4
-D=4
+D_4
 Dt4
 Ed4
-E=4
-F=4
+E_4
+F_4
 Ft4
 Gd4
-G=4
+G_4
 Gt4
 Ad4
-A=4
+A_4
 At4
 Bd4
-B=4
-C=5
+B_4
+C_5
 
 17@

examples/notation/18edo-antineutral.sw

@@ -1,22 +1,22 @@
 "Recommended notation for 18 divisions of the octave"
-C=4 = mtof(60)
+C_4 = mtof(60)
 Cd4
-D=4
+D_4
 Dd4
-E=4
+E_4
 Ed4
 Eb4
 Ft4
-F=4
+F_4
 Gt4
-G=4
+G_4
 At4
-A=4
+A_4
 Ab4
-B=4
+B_4
 Bd4
 Bb4
 Ct5
-C=5
+C_5
 
 18b@

examples/notation/19edo-diatonic.sw

@@ -1,23 +1,23 @@
 "Recommended notation for 19 divisions of the octave"
-C=4 = mtof(60)
+C_4 = mtof(60)
 C#4
 Db4
-D=4
+D_4
 D#4
 Eb4
-E=4
+E_4
 E#4
-F=4
+F_4
 F#4
 Gb4
-G=4
+G_4
 G#4
 Ab4
-A=4
+A_4
 A#4
 Bb4
-B=4
+B_4
 B#4
-C=5
+C_5
 
 19@

examples/notation/21edo.sw

@@ -1,25 +1,25 @@
 "Recommended notation for 21 divisions of the octave"
-C=4 = mtof(60)
+C_4 = mtof(60)
 ^C4
 vD4
-D=4
+D_4
 ^D4
 vE4
-E=4
+E_4
 ^E4
 vF4
-F=4
+F_4
 ^F4
 vG4
-G=4
+G_4
 ^G4
 vA4
-A=4
+A_4
 ^A4
 vB4
-B=4
+B_4
 ^B4
 vC5
-C=5
+C_5
 
 21@

examples/notation/23edo-antidiatonic.sw

@@ -1,27 +1,27 @@
 "Recommended notation for 23 divisions of the octave"
-C=4 = mtof(60)
+C_4 = mtof(60)
 ^C4
 vD4
-D=4
+D_4
 ^D4
 vE4
-E=4
+E_4
 ^E4
 ^^E4
 vF4
-F=4
+F_4
 ^F4
 vG4
-G=4
+G_4
 ^G4
 vA4
-A=4
+A_4
 ^A4
 vB4
-B=4
+B_4
 ^B4
 ^^B4
 vC5
-C=5
+C_5
 
 23@

examples/notation/24edo-neutral.sw

@@ -1,28 +1,28 @@
 "Recommended notation for 24 divisions of the octave"
-C=4 = mtof(60)
+C_4 = mtof(60)
 Ct4
 C#4
 Dd4
-D=4
+D_4
 Dt4
 Eb4
 Ed4
-E=4
+E_4
 Et4
-F=4
+F_4
 Ft4
 F#4
 Gd4
-G=4
+G_4
 Gt4
 G#4
 Ad4
-A=4
+A_4
 At4
 Bb4
 Bd4
-B=4
+B_4
 Bt4
-C=5
+C_5
 
 24@