Extra used in AudioManager.ActionHdmiAudioPlug to define the audio encodings supported by the connected HDMI device. The corresponding array of encoding values is only available when the device is plugged in (as expressed by AudioManager.ExtraAudioPlugState). Encoding values are defined in Android.Media.AudioFormat (for instance see AudioFormat.ENCODING_PCM_16BIT). Use Android.Content.Intent.GetIntArrayExtra(string) to retrieve the encoding values.