User guide

Allows audio

input

(recording) and

output

(playback)

Interrupts

non-mixable

apps audio

Silenced by

the

Ring/Silent

switch and

by screen

locking

see

note

Category identifiers

Input onlyYesNo

(recording

continues

with the

screen

locked)

AVAudioSessionCategoryRecord

Output onlyYesYesAVAudioSessionCategorySoloAmbient

Note: For your app to continue playing audio when the Ring/Silent switch is set to silent and the

screen is locked, make sure the UIBackgroundModes audio key has been added to your app’s

Info.plist file. This requirement is in addition to your using the correct category.

Table B-2 provides a list of modes and what categories each mode can be used with.

Table B-2 Modes and associated categories

Compatible categoriesMode identifiers

AllAVAudioSessionModeDefault

AVAudioSessionCategoryPlayAndRecordAVAudioSessionModeVoiceChat

AVAudioSessionCategoryPlayAndRecordAVAudioSessionModeGameChat

AVAudioSessionCategoryPlayAndRecord

AVAudioSessionCategoryRecord

AVAudioSessionModeVideoRecording

AVAudioSessionCategoryPlaybackAVAudioSessionModeMoviePlayback

AVAudioSessionCategoryPlayAndRecord

AVAudioSessionCategoryRecord

AVAudioSessionCategoryPlayback

AVAudioSessionModeMeasurement

Audio Session Categories and Modes