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# kAudioSessionMode_VoiceChat

Specify this mode if your app is performing two-way voice communication, such as using Voice over Internet Protocol (VoIP).

```
var kAudioSessionMode_VoiceChat: Int { get }
```

## Discussion

When this mode is in use, the device’s tonal equalization is optimized for voice. For use with the [`kAudioSessionCategory_PlayAndRecord`](/documentation/AudioToolbox/kAudioSessionCategory_PlayAndRecord) audio session category. On devices with more than one built-in microphone, the primary microphone is used.

Using this mode has the side effect of setting the [`kAudioSessionProperty_OverrideCategoryEnableBluetoothInput`](/documentation/AudioToolbox/kAudioSessionProperty_OverrideCategoryEnableBluetoothInput) category override to `TRUE`.

This mode is equivalent to the <doc://com.apple.documentation/documentation/AVFAudio/AVAudioSession/Mode-swift.struct/voiceChat> mode provided in the AVFoundation framework.

---

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