https://github.com/danigb/andante

Yet another web audio API music scheduler
https://github.com/danigb/andante

Last synced: 13 days ago
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Yet another web audio API music scheduler

• Host: GitHub
• URL: https://github.com/danigb/andante
• Owner: danigb
• License: mit
• Created: 2015-05-29T09:53:48.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2015-06-03T01:25:21.000Z (over 9 years ago)
• Last Synced: 2024-10-30T03:43:11.440Z (21 days ago)
• Language: JavaScript
• Homepage:
• Size: 152 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
# andante

Yet another music scheduler. Given an array of events with value, position and

duration (both in seconds), schedule the events to play:

```js

var ctx = new AudioContext();

var andante = require('andante')(ctx);

var instrument = ...;

var events = "c d e f g".split(' ').map(function(note, index) {

  return { value: note, position: index * 0.5, duration: 0.5 };

});

andante.schedule(events, function(event, time) {

  // time function maps from events time to WebAudio context time

  instrument.play(event.value, time(event.position), time(event.duration))

});

```

This is the scheduler of [ScoreJS](http://github.com/danigb/scorejs)

and works easy with [soundfont-player](http://github.com/danigb/soundfont-player)

```js

var ctx = new AudioContext();

var Score = require('scorejs');

var andante = require('andante')(ctx);

var soundfont = require('soundfont-player')(ctx);

var melody = Score('a b c d | e f g a4');

var reverse = melody.reverse().transpose('M3');

var score = Score.merge(melody, reverse).repeat(5).toTempo(90);

var piano = soundfont.instruent('acoustic_grand_piano');

andante.schedule(score, function(event, position, duration)) {

  piano.play(event.value, position, duration);

}

```

## Running the example

Clone this repo, start a server:

```bash

npm i -g http-server

http-server

```

And visit `http://localhost:8080/example`

## License

MIT License