質量差，同時嘗試在iPhone中錄製音頻

Question

我正在使用AVAudioRecorder類錄製用戶在我的應用中輸入的語音。我可以錄製和播放聲音。但是，產量的質量很低。嘗試播放錄製的音頻時，背景中出現很多噪音。 我該怎麼做才能獲得豐富的音質輸出。我正在使用以下設置（代碼）來錄製聲音。

NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc] init]; 
    [recordSetting setValue:[NSNumber numberWithInt:kAudioFormatAppleLossless] forKey:AVFormatIDKey]; 
    [recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey]; // previously i'v used 8400 
    [recordSetting setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey]; 

和播放音頻回

[[AVAudioSession sharedInstance] setCategory: 
AVAudioSessionCategoryPlayback error:NULL]; 

NSURL *fileTobePlayed = [NSURL fileURLWithPath:[[[[UIApplication sharedApplication]delegate] applicationDocumentsDirectory] stringByAppendingPathComponent:[NSString stringWithFormat:@"%@",currentPage]]]; 
//AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:recordedTmpFile error:&error]; 
AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileTobePlayed error:&error]; 

NSLog(@"The file being played is %@",fileTobePlayed); 
[audioPlayer prepareToPlay]; 
[audioPlayer play]; 
audioPlayer.volume = 4.0; 

由於下面的代碼..

Answer 1

使用此代碼添加它。

UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;  

      AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,   
            sizeof (audioRouteOverride),&audioRouteOverride);