@tonaljs/progression
v4.9.0
Published
Build musical chord progressions
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@tonaljs/progression
Convert chord list to roman numerals analysis chord and reverse
Usage
ES6:
import { Progression } from "tonal";
node:
const { Progression } = require("tonal");
API
Progression.fromRomanNumerals(keyTonic: string, chordProgression: string[]) => string[]
Given a tonic and a chord progression expressed in roman numeral analysis 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"]