Documentation: Buzz

Buzz is a small Javascript library that helps you to easily include and manage sounds in your websites using the HTML5 audio tag. It degrades silently on non-modern browsers.

Important: In order to save bandwidth, mobile devices don't load/play sounds without user intervention (no autoplay). iPhone and iPad can only play one sound at a time and don't allow to change the volume dynamically.

Constructor

new buzz.sound( sources, [settings] )

Create a new sound instance.

var mySound = new buzz.sound("/sounds/mysound.ogg");

Many files can be set by an array of URIs.

var mySound = new buzz.sound([
    "/sounds/mysound.ogg",
    "/sounds/mysound.mp3",
    "/sounds/mysound.aac",
    "/sounds/mysound.wav"
]);

In order to stay DRY, many files can be set this way as well.

var mySound = new buzz.sound("/sounds/mysound", {
    formats: [ "ogg", "mp3", "aac", "wav" ]
});

Settings

var mySound = new buzz.sound("/sounds/mysound", {
    formats: [ "ogg", "mp3", "aac", "wav" ],
    preload: true,
    autoplay: true,
    loop: false
});
preload metadata / true / false

A boolean specifying whether the sound should be loaded when the page loads. metadata specifies that the browser should load only metadata (duration etc...).

autoplay true / false

A boolean specifying whether the sound should play as soon as it can.

loop true / false

A boolean specifying whether the sound should be repeatedly played. Most of the browsers are not good at that yet, don't expect a perfect loop.

volume 0-100

Set the default volume.

Default: 80

webAudioApi true / false

Route through Web Audio API to improve performance if available.

Default: false

crossOrigin true / false

When loading audio files from another domain in SSL, Chrome will not load the file with error MediaElementAudioSource outputs zeroes due to CORS access restrictions". This option adds the property required to make a proper CORS request.

Note: The destination domain should have a proper Access-Control-Allow-Origin HTTP header.

Default: false`

Methods

Note that almost all methods are chainable.

mySound.loop().play().fadeIn();

sound.load()

Load the sound.

mySound.load();

Playback

sound.play()

Load the sound and begin playback.

mySound.play();

sound.pause()

Pause the sound. If playback is started again, it will restart from where it was paused.

mySound.pause();

sound.togglePlay()

Automatically pause or play the sound.

mySound.togglePlay();

sound.isPaused()

Return true if the sound is paused or is ended. Return false otherwise.

if (mySound.isPaused()) {
    alert("The sound is paused!");
}

sound.stop()

Stop the sound. If the playback is started again, it will restart from the start.

mySound.stop();

sound.isEnded()

Return true if the sound is ended. Return false otherwise.

if (mySound.isEnded()) {
    alert("The sound has ended!");
}

sound.loop()

Keep re-playing the sound once it has finished.

mySound.loop();

sound.unloop()

Stop re-playing the sound once it has finished.

mySound.unloop();

Volume

sound.mute()

Mute the sound.

mySound.mute();

sound.unmute()

Unmute the sound.

mySound.unmute();

sound.toggleMute()

Automatically mute or unmute the sound.

mySound.toggleMute();

sound.isMuted()

Return true if the sound is muted. Return false otherwise.

if (mySound.isMuted()) {
    alert("The sound is muted!");
}

sound.setVolume(volume)

Set the volume of the sound. The range is 0-100.

mySound.setVolume(90);

sound.getVolume()

Return the volume of the sound. The range is 0-100.

var volume = mySound.getVolume();

sound.increaseVolume([volume])

Increase the volume of the sound by 1 or {volume}.

mySound.increaseVolume(); // Current volume +1

sound.decreaseVolume( [volume] )

Decrease the volume of the sound by 1 or {volume}.

mySound.decreaseVolume(10); // Current volume -10

sound.fadeIn( [duration], [callback] )

Fade the volume of the sound in (from 0 to 100) in {duration} milliseconds. A {callback} function can be set and called when the fade-in is complete.

mySound.fadeIn(2000);

sound.fadeOut( [duration], [callback] )

Fade the volume of the sound out (from current volume to 0) in {duration} milliseconds. A {callback} function can be set and called when the fade-in is complete.

mySound.fadeOut(2000);

sound.fadeTo( volume, [duration], [callback] )

Fade the volume of the sound from the current volume to {volume} in {duration} milliseconds. A {callback} function can be set and called when the fade-in is complete.

// Fade volume from 20 to 90 in 2 seconds and then back to 20.
mySound.setVolume(20).fadeTo(90, 2000, function () {
    this.fadeTo(20, 2000);
});

sound.fadeWith( sound, [duration] )

Fade-out the volume of the current sound while fade-in a new sound.

var myOtherSound = new buzz.sound("/sounds/myothersound.ogg");
mySound.fadeWith(myOtherSound, 2000);

Events

sound.bind( event, callback )

Add one or many event listeners to a sound. See Event section for more details.

mySound.bind("ended pause", function () {
    var percent = buzz.toPercent(this.getTime(), this.getDuration()),
        message = "Stopped or paused at " + percent + "%";
    document.getElementById("percent").innerHTML = message;
});

Events can be namespaced. Namespacing allows to unbind or trigger some events of a type without affecting others.

mySound.bind("ended.one pause.one", function () {
    alert("Event type one");
}).bind("ended.two pause.two", function () {
    alert("Event type two");
});

sound.bindOnce( event, callback )

Add one or many event listeners to be executed once. See Event section for more details.

mySound.bindOnce("pause", function () {
    alert("To be executed only at the first pause.");
});

sound.unbind( event )

Remove the event listeners bound to a sound. Events to unbind can be namespaced.

mySound.unbind("ended.one .two");

sound.trigger( event )

Execute the handlers attached to an event. Note that only the functions are trigged, not the native event.

mySound.trigger("ended.one");

Getters and setters

sound.setTime( seconds )

Set the playback position in seconds.

mySound.setTime(90);

The fromTimer helper can be useful here.

mySound.setTime(buzz.fromTimer("01:30"));

sound.getTime()

Get the current playback position in seconds.

var seconds = mySound.getTime(); // 90

The toTimer helper can be useful here.

var timer = buzz.toTimer(mySound.getTime()); // 01:30

sound.setPercent( percent )

Set the playback position in {percent}.

mySound.setPercent(50); // 50%

sound.getPercent()

Get the playback position in percent.

var percent = mySound.getPercent() + "%";

sound.getDuration()

Get the total duration of the sound in seconds.

var duration = mySound.getDuration() + " seconds";

The toTimer helper can be useful here.

var timer = buzz.toTimer(mySound.getDuration()); // 05:46

sound.setSpeed( speed )

Set the playback speed where 1 is normal speed, 2 is double speed, etc.

mySound.setSpeed(2); // x2

sound.getSpeed()

Get the playback speed.

var speed = mySound.getSpeed();

sound.set( property, value )

Directly set the native properties of an HTML5 audio element.

mySound.set("volume", 0.5);
mySound.set("currentTime", 90);

sound.get()

Directly get the native properties of an HTML5 audio element.

var loop = mySound.get("loop");

Time Ranges

sound.getPlayed()

Get an array that represents the ranges of the sound that the browser has played.

var played = mySound.getPlayed();

for (var i in played) {
    console.log(played[i]);
}

sound.getBuffered()

Get an array with ranges of the sound that the browser has buffered.

var buffered = mySound.getBuffered();

for (var i in buffered) {
    console.log(buffered[i]);
}

sound.getSeekable()

Get an array with ranges of the sound to which it is possible for the browser to seek.

var seekable = mySound.getSeekable();

for (var i in seekable) {
    console.log(seekable[i]);
}

Errors and States

sound.getErrorCode(), sound.getErrorMessage()

Return the code/message of the current error.

  • 1, MEDIA_ERR_ABORTED The fetching process for sound was aborted by the user agent at the user's request.
  • 2, MEDIA_ERR_NETWORK A network error of some description caused the browser to stop fetching the sound, after the sound was established to be usable.
  • 3, MEDIA_ERR_DECODE An error of some description occurred while decoding the sound, after the resource was established to be usable.
  • 4, MEDIA_ERR_SRC_NOT_SUPPORTED The src attribute was not suitable.
mySound.bind("error", function () {
    alert("Error: " + this.getErrorMessage());
});

sound.getStateCode(), sound.getStateMessage()

Return the code/message of the sound current state.

  • 0, HAVE_NOTHING No information is available.
  • 1, HAVE_METADATA Enough of the sound has been obtained to get some info.
  • 2, HAVE_CURRENT_DATA Data for the immediate current playback position is available.
  • 3, HAVE_FUTURE_DATA Data is available for the immediate current playback position and to advance the current playback position.
  • 4, HAVE_ENOUGH_DATA All information are available.

sound.getNetworkStateCode(), sound.getNetworkStateMessage()

Return the code/message of the network current state.

  • 0, NETWORK_EMPTY The sound has not yet been initialized.
  • 1, NETWORK_IDLE The sound has been selected but it is not actually using the network.
  • 2, NETWORK_LOADING The browser is actively trying to download data.
  • 3, NETWORK_NO_SOURCE The sound is not available.