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music-theory-toolkit
Advanced tools
This is a toolkit for note/chord/set parsing, transposition, and enumeration.
Consider interfaces to be unstable - I'm not strictly following semver until this library hits v1.0.0, but the following might help guide adoption/usage until then:
In your node or JavaScript project using NPM ( run npm init
in a new directory, and follow the prompts ):
npm i music-theory-toolkit
Object Usage
import { Note } from 'music-theory-toolkit';
// Generates a random note if not passed an arg,
// calculates numeric, absolute numeric, and frequency values as properties
const randomNote = new Note();
// Parses note, calculates all properties
const parsedNote = new Note('C#5');
// Transpose a number of half-steps (re-calculates all relevant values)
parsedNote.transpose(-12);
// This class uses the builder pattern, so you can do some pretty crazy things
const buildNote = new Note('C#').transpose(12).transpose(-25).frequency; // => 130.8127826502993 (Hz)
Static Helpers
import { Note } from 'music-theory-toolkit';
// Generate an alpha note filtered to only the # value if there is an enharmonic
// For example, if 'C#/Db' (or numeric 1) would have been the output, it will filter to 'C#'
const alphaNote = Note.random({ alpha: true, flatSharpFilter: '#' }); // => 'C#'
// Generate a numeric note between 0 and 11
const numericNote = Note.random(); // => 5
// Transpose a note to the 0-11 range, and adjust octave accordingly
// If no octave is passed, it assumes octave 4 is the baseline
const baselinedNote = Note.baseline(24); // => { numeric: 0, octave: 6 }
Object Usage
import { Chord } from 'music-theory-toolkit';
const chord = new Chord(); // Not yet implemented - this throws an error
Static Helpers
import { Chord } from 'music-theory-toolkit';
// Generate a random chord
const chordOne = Chord.random(); // => 'C#Maj7'
const chordTwo = Chord.random({ flatSharpFilter: false, maxDifficulty: 1 }); // => 'C#/DbMaj'
const chordThree = Chord.random({ maxDifficulty: 5 }); // => 'C#/Dbø7'
// Get a random chord quality object
const qualityOne = Chord.randomQuality({ maxDifficulty: 5 }); // => { difficulty: 1, name: 'Major', symbol: 'Maj', structure: [0, 4, 7] }
const qualityTwo = Chord.randomQuality({ targetDifficulty: 2 }); // => { difficulty: 2, name: 'Augmented', symbol: '+', structure: [0, 4, 8] }
Testing libraries: Mocha & Chai
npm test
FAQs
Note/chord/set parsing, transposition, and enumeration tools
We found that music-theory-toolkit demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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