Some Dolby Audio formats, for example Dolby AC-4, are currently not supported natively within iOS. To support decoding of AC-4, app developers can integrate the Dolby Audio for Applications (DAA) SDK. However, integration of DAA with the high-level iOS AVPlayer API is not supported.

To address this, Dolby has developed an open-source player framework known as DAAPlay that integrates DAA with the AVAudioEngine API.

Alternatively, an app can choose to integrate with a third-party player framework such as NexPlayer that supports DAA integration.