EDI

An equal division of the interval (EDI) is when an interval is split into equal sub-intervals. This method can be used to expand the sound palette of scales beyond just the notes in the scale, or as a way of forming non-octave scales.

A division of an interval into sub-intervals can be referred to according to the larger interval; e.g. dividing a perfect 5th into smaller intervals is referred to as EDF or EDP5. To notate the number of sub-intervals (e.g. a perfect 5th split into 2 equal intervals), add a slash and the number of intervals: EDF/2 or EDP5/2.

Examples

• Moon River, by Jacob Collier, at 4:32
• Leaf Fabric, by Katherine Balch, during the ending section
• Acute, by Dmitri Volkov, at measure 12