Type Alias SpelledInterval

A spelled interval: a diatonic number, a quality label, and its semitone span.

type SpelledInterval = {
    number: number;
    quality: string;
    semitones: number;
}

Properties

number: number

Diatonic size: 1 = unison, 2 = second, ... 8 = octave, and beyond.

quality: string

Quality label: 'P', 'M', 'm', or repeated 'A'/'d' for (multiply) aug/dim.

semitones: number

Signed semitone distance from the first note to the second.