int CAMCORDER Microphone audio source with same orientation as camera if available, the main device microphone otherwise
int DEFAULT Default audio source
int MIC Microphone audio source
int REMOTE_SUBMIX Audio source for a submix of audio streams to be presented remotely.
int VOICE_CALL Voice call uplink + downlink audio source
int VOICE_COMMUNICATION Microphone audio source tuned for voice communications such as VoIP.
int VOICE_DOWNLINK Voice call downlink (Rx) audio source
int VOICE_RECOGNITION Microphone audio source tuned for voice recognition if available, behaves like DEFAULT otherwise.
int VOICE_UPLINK Voice call uplink (Tx) audio source
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