spokenAudio is better suited for the AudioSession mode, as it will interrupt the audiobook playback when a spoken notification is triggered.
Appropriate for applications which play spoken audio and wish to be paused (via audio session interruption) rather than ducked if another app (such as a navigation app) plays a spoken audio prompt. Examples of apps that would use this are podcast players and audio books. For more information, see the related category option AVAudioSessionCategoryOptionInterruptSpokenAudioAndMixWithOthers.
spokenAudio
is better suited for theAudioSession
mode, as it will interrupt the audiobook playback when a spoken notification is triggered.