Chord Constructor

This package started out of need.

When I was writting a Web App which suggested random chords to play, I found myself in need of a really big list of chords

I wanted every chord I could think of, and since I coulnd't find anything that delivered them in JSON, I got to work

What it does

This packages exports a function: getChords(chordType), which returns all chords in the circle of fifths of a certain type, with the inclusion of F#/Gb.

AKA: all chords between 0 & 6 alterations, both sharps and flats

Chords are output in JSON as follows:

chord = {[notes], name, symbol}

For example

C major chord:

{
    notes: ['C', 'E', 'G'],
    name: 'C major',
    symbol: 'C'
}

Arguments

getChords(chordType, amount, rootName, options)

• chordType: String. The types of chords can be found in constants.js. I only made so many, but feel free to expand. The current full list is:

• major
• minor
• major seventh
• minor seventh
• semi diminished seventh
• diminished seventh (1 bug)
• power chord

Arguments

• amount: Number. The amount of alterations that you want to iterate through. Default is amount = 6:

6 * 2 (flats & sharps) + root = 13 chords

• rootName: String. The name of the note where you want to start the iteration. Defaults to 'C'

Can be any note as long as it only has one alteration

rootNote = 'Eb' // :heavy_check_mark: | rootNote = 'Ebb' // :x:

• opts: Object. Has properties getFlats & getSharps which default to true. If you want to ignore any or both, just set them to false. Say you only want the chords with sharps (G, D, A, E, B, F#):

    opts: {
        getFlats: false,
        getSharps: true,
    }

Usage

Example with commonJS require

1. Install with npm: npm i chord-constructor
2. Import package
3. Call getChords

const chordConstructor = require('chord-constructor')
const minorChords = chordConstructor.getChords('minor')