The use mode of the audio data.


0: Read-only mode, Users only read the data returned by the SDK without modifying anything. For example, when users acquire the data with the Agora SDK, then start the media push.
2: Read and write mode, Users read the data returned by the SDK, modify it, and then play it. For example, when users have their own audio-effect processing module and perform some voice preprocessing, such as a voice change.