Package Exports

@tonaljs/scale

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Readme

@tonaljs/scale

@tonaljs/scale is a collection of functions to create and manipulate musical scales

API

`scale(name: string) => Scale`

Get a scale from a scale name. Unlike scaleType, scale accepts tonics in the scale name and returns the scale type with two more properties: tonic and notes:

See scale-dictionary for more details.

scale("c5 pentatonic");
// =>
// {
//   empty: false,
//   name: "C5 pentatonic",
//   type: "major pentatonic",
//   tonic: "C5",
//   notes: ["C5", "D5", "E5", "G5", "A5"],
//   intervals: ["1P", "2M", "3M", "5P", "6M"],
//   aliases: ["pentatonic"],
//   setNum: 2708,
//   chroma: "101010010100",
//   normalized: "101010010100"
// }

`chords(scale: string) => string[]`

Get all chords that fits a given scale

Scale.chords("pentatonic");
// => ["5", "64", "M", "M6", "Madd9", "Msus2"]

`extended(scale: string) => string[]`

Get all scales names that are a superset of the given one (has the same notes and at least one more)

Scale.extended("major");
// => ["bebop", "bebop dominant", "bebop major", "chromatic", "ichikosucho"]

`reduced(scale: string) => string[]`

Find all scales names that are a subset of the given one (less notes but all from the given scale)

Scale.reduced("major");
// => ["ionian pentatonic", "major pentatonic", "ritusen"]