Volume shifts
Learn how to manage volume shifts on iOS.
阅读时间1 分钟最后更新于 4 天前
iOS increases the volume of ducked game audio unexpectedly and without notification when certain device events occur. An example of this scenario is when you dismiss the AirPods battery dialog. The following steps detail how to reproduce this behavior:
- Connect the AirPods.
-
Configure the AVAudioSession with:
AVAudioSessionCategoryPlayAndRecordAVAudioSessionModeVoiceChat
-
Open the capture device with VoiceProcessingIO enabled. To do this, use either:
- A CoreAudio Audio Unit with the subtype
kAudioUnitSubType_VoiceProcessingIO - An AVAudioEngine input node and call
setVoiceProcessingEnabled(true)
- A CoreAudio Audio Unit with the
- Play audio from an AVAudioPlayer.
- Open the AirPods case.
- Dismiss the AirPods battery dialog. Note that the audio player volume increases significantly.