cordova-plugin-ui-sounds

This is a Cordova plugin to add simple audio feedback to your mobile applications.

In creating this plugin, we had the following goals:

• Mix with other audio playing on the device without interruption or ducking.
• Low-latency playback with little-to-no impact on the main thread.
• No visible audio playback UI on the device or any paired wearable devices.

Installation

Use the usual command-line to install this plugin within your Cordova-based project:

cordova plugin add cordova-plugin-ui-sounds

Usage

// During app initialization, after deviceReady:
var uiSounds = cordova.require('cordova-plugin-ui-sounds.Plugin');
uiSounds
  .preloadSound('assets/myTapSound.mp3')
  .catch(error => console.error(error));

// During button press event:
var myVolume = 1.0;
uiSounds.playSound('assets/myTapSound.mp3', myVolume);

// If you will never use the sound again:
uiSounds.unloadSound('assets/myTapSound.mp3');

API

preloadSound(assetPath)

Loads a sound asset so that it is already in memory when a subsequent playSound call is made.

In order to achieve low latency between UI events and audio feedback, it is good practice to call preloadSound for each of your app's sound effects after deviceReady.

• assetPath (string) - Tells the operating system where to find the sound file. This must be a path relative to your project's www folder. It is case-sensitive.
• Return Value (Promise<string>) - Promise containing an appropriate success or failure message. Resolves when the asset has finished loading.

preloadMultiple(arrayOfAssetPaths)

Loads multiple sound assets at a time.

In order to achieve low latency between UI events and audio feedback, it is good practice to pre-load all of your app's sound effects after deviceReady.

• arrayOfAssetPaths (string[]) - Tells the operating system where to find each sound file. Each string in this array must be a path relative to your project's www folder. It is case-sensitive.
• Return Value (Promise<string>) - Promise containing an appropriate success or failure message. Resolves when all assets have finished loading.

playSound(assetPath, [volume])

Plays a sound asset on the device's system audio channel.

If the sound has not been loading yet using preloadSound, it will be loaded before playing.

• assetPath (string) - Tells the operating system where to find the sound file. This must be a path relative to your project's www folder. It is case-sensitive.
• volume (double, optional) - Indicates the desired playback volume of this sound relative to other system sounds. This parameter is ignored on iOS (see iOS Limitations). It no value is given, this parameter will default to 1.0.
• Return Value (Promise<string>) - Promise containing an appropriate success or failure message. Resolves when the asset has started playback.

unloadSound(assetPath)

Frees the resources associated with the given sound asset.

If you no longer need a sound asset, it is good practice to free the resource using this method.

• assetPath (string) - Tells the operating system where to find the sound file. This must be a path relative to your project's www folder. It is case-sensitive.
• Return Value (Promise<string>) - Promise containing an appropriate success or failure message. Resolves when the asset has been unloaded.

Limitations

As this plugin is intended to play quick UI feedback sound effects:

• Sounds play immediately
• Looping and stereo positioning are unavailable
• Simultaneous playback is unavailable: You can play only one sound at a time
• The sound is played locally on the device speakers; it does not use audio routing.
• Playback volume is linked to the device's system audio channel, meaning no sounds are played while the device is in silent/vibrate mode.

iOS Limitations

From the official Apple documentation, sound files that you play using this plugin must be:

• No longer than 30 seconds in duration
• In linear PCM or IMA4 (IMA/ADPCM) format
• Packaged in a .caf, .aif, or .wav file (note: .mp3 seems to work just fine as well)

In addition:

• Sounds play at the current system audio volume, with no programmatic volume control available

Android Limitations

A number of audio file formats are supported (see the full list): .mp3, .mp4, .flac, .wav, .ogg

Unlike iOS, programmatic volume control is available on Android (relative to the system sound channel).

Alternatives

HTML Audio

cordova-plugin-nativeaudio

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Versioning

We use SemVer for versioning. For the versions available, see the tags on this repository.

License

MIT