Notification sounds
Adding custom sounds to mobile notifications.
Custom sounds are a way to provide a more unique, branded experience for your app. You may add a custom sound with every notification you send, or you may add sounds to just certain types of notifications. For instance, a game like “Jewel Breaker” may wish to have a jewel-like sound always played when receiving notifications. Meanwhile, a social network may wish to only play sounds when the user receives a message from another user to differentiate those notifications from more generic system notifications.
For mobile apps only. Not supported on web push.
Setup
Create sound files
Be sure to create sound files according to the following rules. If the device cannot find the file in question, or if the file is not in a supported format, it will fall back to the default system notification sound.
Keep sound filenames lowercase since some platforms ignore upper case letters for sound files. Instead of AwesomeSound.wav use awesomesound.wav or awesome_sound.wav.
| Platform | Extensions | Notes |
|---|---|---|
| iOS | .wav .aiff .caf | Apple is picky about file formats. Sounds must be encoded as Linear PCM, MA4 (IMA/ADPCM), µLaw, or aLaw. Must be less than 30 seconds. |
| Android | .wav .mp3 .ogg | |
| Amazon | .wav .mp3 .ogg | |
| Windows | .wav .mp3 .wma | Must be less than 10 seconds |
Add sound files to app
To adds sounds to notifications, you must include the sound files as resources within your app. External URLs are not supported.
Add sound files to the appropriate location in your Xcode project depending on your SDK.
| SDK | Folder |
|---|---|
| iOS Native | Add files to the Xcode project root. Make sure Add to targets is selected when adding files so that they are automatically add to the bundle resources. |
| Cordova, Ionic | Add files to Resources directory within the Xcode project in <project-root>/platforms/ios/project-name.xcodeproj. |
| Unity | Add sounds anywhere in your Unity project, build your project, and then move those sounds to the Xcode project root. |
Add sound files to the appropriate location in your Xcode project depending on your SDK.
| SDK | Folder |
|---|---|
| iOS Native | Add files to the Xcode project root. Make sure Add to targets is selected when adding files so that they are automatically add to the bundle resources. |
| Cordova, Ionic | Add files to Resources directory within the Xcode project in <project-root>/platforms/ios/project-name.xcodeproj. |
| Unity | Add sounds anywhere in your Unity project, build your project, and then move those sounds to the Xcode project root. |
Add sound files to the appropriate folder in your project depending on your SDK. If the folder does not exist, create it.
| SDK | Folder |
|---|---|
| Android & Amazon Native | res/raw |
| React Native | <project-root>/android/app/src/main/res/raw |
| Cordova | <project-root>/platforms/android/res/raw/ |
| Ionic | /android/app/src/main/res/raw/ |
| Unity | Assets/Plugins/Android/OneSignalConfig/res/raw NOTE: Your sound and icon file names must be lowercase and can’t contain anything else except underscores and numbers. |
| Flutter | main/res/raw |
| .NET MEUI | <project-root>/Platforms/Android/Resources/raw/ |
Send notifications
Add the file extension when referencing the sound resource. For instance, explode_sound.wav. Set in the dashboard when sending push messages or use the Create Notification API ios_sound property.
For no sound, pass in nil to the Sound field.
Add the file extension when referencing the sound resource. For instance, explode_sound.wav. Set in the dashboard when sending push messages or use the Create Notification API ios_sound property.
For no sound, pass in nil to the Sound field.
Android 8+ introduced Notification Categories which must be setup to customize notification sounds. OneSignal will use the sound set in the Notification Channel for all versions of Android.
In Settings > Messaging > Android Notification Categories create the group and channel.
Set Importance to “Urgent” or “High” to play sound.
Set Sound to “Default” or “Custom” based on your needs. Do not add the file extension when referencing the sound resource. For instance, cat_meow_sound.
For no sound, set Importance to “Urgent” or “High” and Sound to “Off”. Or you can set Importance to “Medium” or “Low” for no sound.
You can then set the category name in the dashboard when sending push messages or use the Create Notification API android_channel_id property. The sound set in the category will work for all android versions.
Instead of sending via the dashboard, you can send notifications with sounds in the REST API by using the appropriate parameter and file extension depending on your platform (see more in Create notification REST API docs).
| Platform | API Parameter | Details |
|---|---|---|
| iOS | ios_sound | Include File Extension. Example: ios_sound : expload_sound.wav No sound, pass nil. |
| Android | android_channel_id - Use if you created channel in the OneSignal Dashboard Notification Categories. existing_android_channel_id - Use if you created the channel elsewhere | Highly recommended to use Android Notification Categories |
| Amazon | adm_sound | Do Not Include File Extension. Example: adm_sound : exploade_sound |
If you’ve very recently added a sound resource to your app, you may want to wait a few days before sending notifications using the sound. This is because it can take many days or even weeks for the majority of your users to update their apps to the latest version which contain your new sound resource.
If a user has an older version of your app without the sound resource and receives a notification that references it, they will hear only the default system notification sound.