Global Variable


The category for playing recorded music or other sounds that are central to the successful use of your app.


const AVAudioSessionCategory AVAudioSessionCategoryPlayback;


When using this category, your app audio continues with the Silent switch set to silent or when the screen locks. (The switch is called the Ring/Silent switch on iPhone.) To continue playing audio when your app transitions to the background (for example, when the screen locks), add the audio value to the UIBackgroundModes key in your information property list file.

By default, using this category implies that your app’s audio is nonmixable—activating your session will interrupt any other audio sessions which are also nonmixable. To allow mixing for this category, use the AVAudioSessionCategoryOptionMixWithOthers option.

See Also

Audio Session Categories


The category for an app in which sound playback is nonprimary—that is, your app also works with the sound turned off.


The category for routing distinct streams of audio data to different output devices at the same time.


The category for recording (input) and playback (output) of audio, such as for a Voice over Internet Protocol (VoIP) app.


The category for recording audio; this category silences playback audio.


The default audio session category.


The category for using an audio hardware codec or signal processor while not playing or recording audio.