music.js
Use Teoria.js Instead
This library is no longer maintained. I recommend using the music theory library Teoria.js instead: https://github.com/saebekassebil/teoria.
Overview
music.js is a music creation library for javascript. It includes functions and data sets to generate notes, intervals, chords, and scales.
Example usage
Note
Note.fromLatin(name): Note by latin name and octave
var n = Note.fromLatin('A4'); // single note
var freq = n.frequency(); // returns 440
var name = n.latin(); // returns "A"
var octave = n.octave(); // returns 4
var cmaj = Note.fromLatin('C4E4G4'); // chord = array of notes
var freq = cmaj[0].frequency(); // returns 261.625...
var name = cmaj[0].latin(); // returns "C"
var octave = cmaj[0].octave(); // returns 4
var n = Note.fromLatin('C4'); // base note for scale
var majorScale = n.scale('major'); // scale = array of notesInterval
Interval.fromName(name): Interval by name
Interval.fromSemitones(num): Interval by semitones
var fifth = Interval.fromName('fifth'); // define by name
var wholeStep = Interval.fromSemitones(2); // define by # of semitones
var c = Note.fromLatin('C3');
// use intervals to transpose notes
var d = c.add(wholeStep);
// use intervals to define chords
var cmaj = c.add(['unison','major third','fifth']);