tune

Tune up baudio.

install

Install tune and baudio: npm install tune baudio

You also need to install SoX: http://sox.sourceforge.net/

examples

Just a single note

var baudio = require('baudio'), tune = require('tune');

var a = tune('A');

var b = baudio(function(t) { return a(t); });
b.play();

Hungarian Dance no5

var baudio = require('baudio'), tune = require('tune');

var hungarian = tune(String(
  'A5 . . . . D5 . F5 . . . . D5 . C#5 . . . . D5 E5 D5 . . . . ' +
  'Bb5 . . . . C5 . D5 . A5 . . . . G4 F4 E4 . . A5 D4 . . .'
).split(' '), {tempo: 8});

var b = baudio(function(t) { return hungarian(t); });
b.play();

Soundgarden - Black Hole Sun

var baudio = require('baudio'), tune = require('tune');

var blackholesun = tune(String(
  'A4 E4 A5 D5 A5 E4 A4 C4 E4 A5 D5 . . . ' +
  'G3 D4 G4 D5 G4 D4 E3 F#3 C#4 F#4 C#5 . . . ' +
  'E3 F3 C4 F4 A#5 F4 C4 F3 E3 D4 E4 B5 . . .'
).split(' '));

var b = baudio(function(t) {
  // black hole sun + some fx
  return blackholesun(t) + Math.sin(2 * Math.PI * t);
});
b.play();

Final Fantasy Arpeggios

var baudio = require('baudio'), tune = require('tune');

var ff = [];
[
  'C D E G',
  'A B C E',
  'C D E G',
  'A B C E',
  'A C F G',
  'A B D G',
  'Ab C Eb G',
  'A Bb D F',
].forEach(function(chord) {
  chord = chord.split(' ');
  var oct = 3, arp = [];
  for (var i = 0; i < (chord.length - 1) * 4; i++) {
    if (i % 4 === 0) oct++;
    arp.push(chord[i % 4] + oct);
  }
  ff = ff.concat(arp.concat(arp.slice(0, -1).reverse()));
});
ff = tune(ff);

var b = baudio(function(t) { return ff(t); });
b.play();

methods

var tune = require('tune');

var t = tune(notes)

Returns a function: function(time[, options]) that will return a value based on time between -1 and 1 to formulate a wave. Then you return the value within your baudio function.

notes can be a single note string: 'A#5' or an array of notes: ['C4', 'D5', 'E4', 'Gb7']. Mark notes with sharps # and flats b. Then ending number refers to the octave. In a sequence if the octave isn't specified, it will use the last set octave or 4. Use . for muted notes.

options are an object literal {}:

tempo [4] - how fast to transition through the notes
volume [1.0] - volume to play the tune: 0.0 - 1.0

Release History

0.2.1 - Readme update.
0.2.0 - tune just returns a function now.
0.1.2 - Add mute notes.
0.1.1 - Better API interface. Add volume option.
0.1.0 - initial release

shama/tune