systems.wsmn.tonal.interval_quality

interval_quality

The quality of a WSMN interval: perfect, major, minor, augmented, diminished, and so on.

There are nineteen qualities, held in QUALITIES and keyed by a relative number: 0 for perfect, +0.5/-0.5 for major/minor, and each augmentation or diminution a further 1 away from there. Whether a quality is reached from perfect or from major/minor is part of its identity (an augmented 4th and an augmented 3rd are one half-step above different things), which is why the numbers are spaced by halves.

Attributes

Name	Description
QUALITIES	The nineteen qualities, keyed by relative number.

Classes

Name	Description
IntervalQuality	One of the nineteen interval qualities; see QUALITIES.