Global Variable


Specify this mode if your app is performing measurement of audio input or output.


const AVAudioSessionMode AVAudioSessionModeMeasurement;


This mode is intended for apps that need to minimize the amount of system-supplied signal processing to input and output signals. If recording on devices with more than one built-in microphone, the primary microphone is used.

For use with the AVAudioSessionCategoryPlayback, AVAudioSessionCategoryRecord, or AVAudioSessionCategoryPlayAndRecord audio session categories.