User:VectorGraphics/BIRCH

BIRCH, the Binary Interval Region Classification Hscheme, utilizes prefixes with rigid definitions to specify any interval size to a given degree of accuracy.

50-cent quarter tones are used as the base step size to be subdivided in this system, as follows, where k is the neutral or perfect interval size in 24edo:

Level 1:

Size	Prefix	Example size	Example name
k-100	infra-	250	infrathird
k-50	minor	300	minor third
k	neutral	350	neutral third
k+50	major	400	major third
k+100	ultra-	450	ultrathird