The AVFoundation audio engine used to play audio from audio nodes contained in the scene.
- iOS 9.0+
- macOS 10.11+
- tvOS 9.0+
- watchOS 2.0+
An audio engine instance is automatically created for you when the scene is created. You can use methods and properties on a scene’s audio engine for overall control of all of its child audio nodes. The following code shows how a scene’s overall volume can be reduced from its default of 1.0 down to 0.2 and then paused: