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 #The octatonic notation described by Cryptic Ruse (Dylathian = CDEFGHABC with C = 261.62 Hz) and Kentaku (Ilarnekian = JKLMNOPQJ with J ≈ 180 Hz), based on the oneirotonic 5L 3s scale.
 #As every other generator of the third-fifths [[pergen]] (P8, P5/3), which is the pergen for [[slendric]]. This is backwards compatible with a notation that has fifths.
+==Oneirotonic scale==
+The term '''oneirotonic''' is used for the 8-note MOS [[5L 3s]], whose brightest mode is 22122121.
+The names I use for the oneirotonic interval classes are borrowed from diatonic interval categories: "second", "third", "fourth", "tritone" (4-step intervals), "fifth" (5-step intervals), "sixth" (6-step intervals), "seventh" (7-step intervals) and octave. You just have to remember that there's an extra category between fourths and fifths and that fourths and fifths are dissonant. Like in archeotonic you can change the perception of an interval by approaching it from different directions, but in oneirotonic it will change what diatonic interval class you hear it as: say, as both a third and a fourth, rather than both a major and a minor third.
+=== Intervals ===
+The Dylathian mode is the most otonal mode, and is the basis for Kentaku note names JKLMNOPQJ (J is approx. 180 Hz, or an 11/8 above middle C). Sortable table of Dylathian (Harmonics are in bold; this is useful for seeing a chord's complexity when you sort the intervals according to the generator chain):
+{| class="wikitable right-1 right-2 sortable"
+|-
+! style="text-align:right" | Degree
+! Cents (13edo)
+! Cents (18edo)
+! Cents (31edo)
+! Note name on J
+! Approximate ratios
+! #Gens up
+|-
+| 1, 9
+| 0.00, 1200.00
+| 0.00, 1200.00
+| 0.00, 1200.00
+| J
+| '''1/1''', '''2/1'''
+| 0
+|-
+| 2
+| 184.62
+| 200.00
+| 193.55
+| K
+| '''9/8''', 10/9, 11/10, 19/17, 21/19
+| +3
+|-
+| 3
+| 369.23
+| 400.00
+| 387.10
+| L
+| '''5/4''', 11/9, 16/13, 26/21
+| +6
+|-
+| 4
+| 461.54
+| 466.67
+| 464.52
+| M
+| 13/10, 17/13, '''21/16''', 22/17
+| +1
+|-
+| 5
+| 646.15
+| 666.66
+| 658.06
+| N
+| 16/11, 13/9, 19/13
+| +4
+|-
+| 6
+| 830.77
+| 866.66
+| 851.61
+| O
+| 8/5, '''13/8''', 18/11, 21/13
+| +7
+|-
+| 7
+| 923.08
+| 933.33
+| 929.03
+| P
+| 17/10, 12/7, 22/13, 19/11
+| +2
+|-
+| 8
+| 1107.69
+| 1133.33
+| 1122.58
+| Q
+| 17/9, 19/10, 21/11, 32/17, 36/19, 40/21
+| +5
+|}
+=== Chords ===
+Despite being melodically familiar, oneirotonic may be the most harmonically complex of the 13edo scales; the most common consonant triad is a fairly complex 4:9:21. Hence oneirotonic may especially benefit from either using inharmonic timbres in addition to harmonic ones or using a well-tempered version of 13edo adopted for this scale. The availability of certain consonances also varies greatly by mode: for example, only Dylathian, Ilarnekian and Sarnathian have a 5/4 on the tonic, and only Mnarian, Kadathian, Hlanithian and Sarnathian have an 11/8 on the tonic.
+=== Modal harmony ===
+How I think about the 8 oneirotonic modes:
+#Dylathian: 2 2 1 2 2 1 2 1 (major with hints of Mixolydian and "#5")
+#Ilarnekian: 2 2 1 2 1 2 2 1 (major with hints of "b6")
+#Celephaïsian: 2 1 2 2 1 2 2 1 (the oneirotonic melodic minor. Very classical-sounding; Easley Blackwood's 13-note etude uses this as its home mode.)
+#Ultharian: 2 1 2 2 1 2 1 2
+#Mnarian: 2 1 2 1 2 2 1 2
+#Kadathian: 1 2 2 1 2 2 1 2
+#Hlanithian: 1 2 2 1 2 1 2 2
+#Sarnathian: 1 2 1 2 2 1 2 2
+==== Modes with sharp tritone ====
+The brighter modes can be viewed as providing a distorted version of diatonic functional harmony. For example, in the Dylathian mode, the 4:5:9 triad on the sixth degree can sound like both "V" and "III of iv" depending on context. Basic chord progressions can move by minor fourths, thirds, or major seconds: for example, J major-M minor-P minor-Ob major-J major (in Ilarnekian) or J major-K major-O major-M major-J major (in Dylathian).
+==== Modes with flat tritone ====
+The darker modes are radically different in character than the brighter modes. Because of the consonant 11/8 minor tritone and the 13/8 minor sixth, 11/8 sounds more like a stable scale function and the relatively dissonant 21/16 minor fourth wants to be a major third resolving up to the 11/8.
+=== Samples ===
+[[File:Oneirotonic 3 part sample.mp3]]
+‎(A rather classical-sounding 3-part harmonization of the ascending J Ilarnekian scale; tuning is 13edo)
 ==A-Team tuning spectrum==