How to play sound through earpiece speaker on iOS devices?

[jordibruin]

:beetle: Description I'm trying to play a sound through the earpiece speakers so that a user can only hear it when they put the phone up to their ear.

:beetle: What have you tried? It seems like this feature is only implemented for android, by using the playThroughEarpieceAndroid: true prop.

Is your issue with...

• [X] iOS
• [ ] Android
• [ ] Windows

Are you using...

• [X] React Native CLI (e.g. react-native run-android)
• [X] Expo
• [ ] Other: (please specify)

Which versions are you using?

• React Native Sound: 0.11.0
• React Native: 0.61.2
• iOS: 13

Does the problem occur on...

• [ ] Simulator
• [X] Device

If your problem is happening on a device, which device?

• Device: iPhone XS

:beetle: Please post your code:

Audio.setAudioModeAsync({
      allowsRecordingIOS: false,
      interruptionModeIOS: Audio.INTERRUPTION_MODE_IOS_DO_NOT_MIX,
      playsInSilentModeIOS: true,
      shouldDuckAndroid: true,
      interruptionModeAndroid: Audio.INTERRUPTION_MODE_ANDROID_DO_NOT_MIX,
      playThroughEarpieceAndroid: true,
      staysActiveInBackground: false
    });
  }

  async _playRecording() {
    const { sound } = await Audio.Sound.create(
      source,
      {
        shouldPlay: true,
        isLooping: true
      },
      this._updateScreenForSoundStatus
    );
    this.sound = sound;
    this.setState({
      playingStatus: "playing"
    });
  }