@tonaljs/progression

Build musical chord progressions

Usage no npm install needed!

<script type="module">
  import tonaljsProgression from 'https://cdn.skypack.dev/@tonaljs/progression';
</script>

README

@tonaljs/progression tonal npm version

Convert chord list to roman numerals analysis chord and reverse

Usage

ES6:

import { Progression } from "@tonaljs/tonal";

node:

const { Progression } = require("@tonaljs/tonal");

API

Progression.fromRomanNumerals(keyTonic: string, chordProgression: string[]) => string[]

Given a tonic and a chord progression expressed in roman numeral analisys chords, returns the progression expressed in leadsheet chords.

Progression.fromRomanNumerals("C", ["IMaj7", "IIm7", "V7"]);
// => ["CMaj7", "Dm7", "G7"]

Progression.toRomanNumerals(keyTonic: string, chordProgression: string[]) => string[]

The opposite of fromRomanNumerals. Given a tonic and a chord progression expressed in leadsheet chords, returns the progression using roman numeral analysis chords.

Progression.toRomanNumerals("C", ["CMaj7", "Dm7", "G7"]);
// => "IMaj7", "IIm7", "V7"]

Resources