Cannot play an mp3, mp4, or any other music format using
startAudioMixing on Android 10.
This is caused by an Android permission limit. If
targetSdkVersion ≥ 29, you need to add relevant app privileges to play the a music file.
For Android projects with
targetSdkVersion ≥ 29, add the following line in the
application zone of the AndroidManifest.xml file to play the music file:
<application Android:requestLegacyExternalStorage="true"> … </application>
For more Android permission settings and considerations, see Add project permissions.