Unity Microphone.End() 将 iOS 上的所有游戏音频静音

Question

This happens if iPhone silent mode is on. I have a button that records the microphone in the game. When the game starts background music and SFX play just fine. When I stop recording, all game audio is muted until I turn iPhone silent mode off. There is no problem if silent mode was off to begin with.

EDIT TO INCLUDE CODE:

public void RecordAudio()
{
    recordedClip = Microphone.Start(null, false, 20, 44100);
}

//the audio gets muted when I run this.

public void StopRecordingAudio()
{

    tempPath = Path.Combine(Application.persistentDataPath, "Audio");
    tempPath = Path.Combine(tempPath, "audio_clip.wav");
    Microphone.End(null);
    SaveWav.Save(tempPath, recordedClip);

}

I am using this to save the audio clip.

Answer 1

The solution is to check Prepare iOS For Recording and Force iOS Speakers Speakers When Recording in Player Settings/iOS.

Checking Prepare iOS For Recording caused a different error where the microphone failed to initialize. This is fixed by adding the following to UnityViewControllerBase.mm in the Xcode Project/Classes/UI in (void)viewWillAppear ;

AVAudioSession *audioSession = [AVAudioSession sharedInstance];
         [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];
         [audioSession setActive:YES error:nil];

Don't forget: #import "AVFoundation/AVFoundation.h"

Theres also a bug I'm Unity that forces audio to play from the earpiece even if you check Force Speakers when Recording. This only happens when you check Prepare iOS For Recording. The issue can be tracked here I used this as a temporary fix for that even though it's quite old but works - in the meantime as Unity fixes the bug.