Fox–Raven notation

The Fox-Raven notation (FRN) is an absolute pitch-based notation for oneirotonic.

Concept and Score

FRN is a notation scheme for oneirotonic tunings, tailored to AP hearers.

The score should include the text "This score uses the Fox-Raven notation standard. Visit xen.wiki for more information." This ensures that someone reading the score can easily find information about how to read it.

Pitch standard

The default pitch standard in FRN is N4 = standard middle C = 261.6255653 Hz. The term Middle J is used for the note J4, which lies a major 4-mosstep above N4 = middle C.

To change the pitch standard, indicate the pitch standard you're using (e.g. "M4 = 222 Hz") on top of the score.

Note names

The note names N4 O4 P4 Q4 J4 K4 L4 M4 N5 denote the Sarnathian (0|7 in UDP, sLsLLsLL) mode on N4 = C4. All octave transpositions use the appropriate octave number, and all alterations of a given note by accidentals have the same octave number as the original note. For example, in 13edo Nb4 is the note 1\13 below N4, and is enharmonic with M#4.

FRN accidentals are analogous to diatonic ones:

• # b represent alteration by one moschroma (L − s)
• x bb represent alteration by two moschomas.
• t and d represent half-moschromas in systems such as 18edo and 26edo where the moschroma can be split into two equal parts. These cannot be used in systems that do not split the oneirotonic chroma into two equal parrs, such as 21edo.
• In edo systems, ^ v denote alteration by one edo step. They cannot be used when the notation is not edo-based (e.g. based on a non-edo oneirotonic generator).

When writing a note name, the nominal is given first, then the accidentals are listed in order from smallest to largest, then the octave number: e.g. M^db4 in 36edo means M4 altered by ^ (1\36) + d (-2\36) + b (-4\36), that is M4 flattened by 5\36.

Chain of oneirofourths

... Lb Ob Jb Mb Pb Kb Nb Qb L O J M P K N Q L# O# J# M# P# K# N# Q# ...

Enharmonic equivalences in the simplest oneirotonic edos:

• 13edo: K# = L
• 18edo: K# = Mb
• 21edo: K# = Lb

Step sizes

• 13edo: J-J# = K-L = 1\13, J-K = 2\13
• 18edo: J-J# = 2\18, J-K = 3\18, K-L = 1\18
• 21edo: J-J# = 1\21, J-K = 3\21, K-L = 2\21
• 23edo: J-J# = 3\23, J-K = 4\23, K-L = 1\23
• 29edo: J-J# = 1\29, J-K = 4\29, K-L = 3\23
• 31edo: J-J# = 3\31, J-K = 5\31, K-L = 2\31
• 34edo: J-J# = 2\34, J-K = 5\34, K-L = 3\34