User:VectorGraphics/REXICS

REXICS is a contrarian interval classification system. For any JI interval that is given a name corresponding to a diatonic interval category, the REXICS classification classifies it as the other corresponding enharmonic interval category.

Unison <-> Diminished second

Augmented unison <-> Minor second

Diminished third <-> Major second

Minor third <-> Augmented second

Major third <-> Diminished fourth

Augmented third <-> Perfect fourth

Diminished fifth <-> Augmented fourth

And octave complements.