Hi, When testing my project on an iPhone 5S the following message gets logged to the console in XCode: AVAudioSessionPortImpl.mm:56:ValidateRequiredFields: Unknown selected data source for Port Speaker (type: Speaker) And no audio is being played back. The device is not muted or anything. Also tested on a iPhone 6 and it works there. iOS version on iPhone 5S is 12.0.1 Unity version is 2018.3.13f1 Thoughts?