Я пытаюсь изменить высоту звука, но не могу сохранить звук. Как сохранить звук в фоновом режиме?

Question

Этот метод фильтрации звука и изменить высоту, но нигде не сохраняется где

-(void)Pitch:(NSNumber*)pitch 
{ 
audioPlayerNode = [AVAudioPlayerNode new]; 
[self.audioEngine attachNode:audioPlayerNode]; 

AVAudioUnitTimePitch *timePitchEffect = [AVAudioUnitTimePitch new]; 
[self.audioEngine attachNode:timePitchEffect]; 
    timePitchEffect.pitch = [pitch floatValue]; 

[self.audioEngine connect:audioPlayerNode 
         to:timePitchEffect 
        format:nil]; 
[self.audioEngine connect:timePitchEffect 
         to:self.audioEngine.outputNode 
        format:nil]; 

[audioPlayerNode scheduleFile:self.audioFile 
         atTime:nil 
      completionHandler:nil]; 

[self.audioEngine startAndReturnError:&audioEngineError]; 
} 

Здесь им возможность создать аудиофайл, но ни один звук не доступен в аудио может любой помочь мне выйти из этого создается новый файл называется выходной_файл, но когда я играю, что аудио звук не есть просто немой, полный аудио создается, но без звука

-(void)saveEffectedAudioToFolder 

{ 
AVAudioUnitTimePitch *pitchEffect = [AVAudioUnitTimePitch new]; 

NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc] init]; 

[recordSetting setValue :[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey]; 
[recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey]; 
[recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey]; 
[recordSetting setValue :[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey]; 
[recordSetting setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey]; 
[recordSetting setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey]; 
[recordSetting setValue:[NSNumber numberWithFloat:pitch] forKey:AVAudioTimePitchAlgorithmSpectral]; 



AVAudioFormat *commonFormat = [[AVAudioFormat alloc] initWithSettings:recordSetting]; 
pitchEffect.pitch =pitch; 

[self setupEQ]; 


NSError *error12; 
[_audioEngine startAndReturnError:&error12]; 
if (!error12) 
{ 
    NSLog(@"Engine = %@",_audioEngine); 
    [audioPlayerNode scheduleFile:_audioFile atTime:nil completionHandler:nil]; 


    NSError *error; 
    _outputFile = [[AVAudioFile alloc] initForWriting:[self testFilePathURL] settings:commonFormat.settings error:&error]; 
    NSLog(@"outputfile = %@",_outputFile); 
    if (error) 
    { 
     NSLog(@"outputFile error = %@",error); 
    } 
    else 

    { 

     [SVProgressHUD dismiss]; 
     [audioPlayerNode installTapOnBus:0 bufferSize:8192 format:_audioFile.processingFormat block:^(AVAudioPCMBuffer *buffer, AVAudioTime *when) { 
      NSLog(@"Buffer Size = %@",buffer); 
      NSLog(@"when = %lld",when.sampleTime); 
      NSLog(@"outputfile length = %lli",_outputFile.length); 
      NSLog(@"input file length = %lld",_audioFile.length); 
      if (_outputFile.length<=_audioFile.length) 
      { 
       NSError *error; 

       [_outputFile writeFromBuffer:buffer error:&error]; 

       if (error) 
       { 
        NSLog(@"writebuffererror =%@",error); 
       } 
      } 
      else 
      { 
       NSError *error2; 



       [audioPlayerNode removeTapOnBus:0]; 

       // player2 = [[AVAudioPlayer alloc] initWithContentsOfURL:[self testFilePathURL] error:&error2]; 
       //player2.delegate = self; 

       NSLog(@"Pathththt = %@",[self testFilePathURL]); 
       NSLog(@"error = %@",error2); 
       [audioPlayerNode scheduleFile:_outputFile atTime:nil completionHandler:nil]; 


       [audioPlayerNode play]; 
       // [self toMp3]; 
      } 

     }]; 
    } 
} 
else 
{ 
    NSLog(@"error12 =%@",error12); 
} 

} 





- (void)setupEQ 
{ 
NSLog(@"setupEQ"); 

_unitEq = [[AVAudioUnitEQ alloc] initWithNumberOfBands:12]; 
_unitEq.globalGain = 3.0; 
AVAudioUnitEQFilterParameters *filterParameters; 
filterParameters = _unitEq.bands[0]; 
filterParameters.filterType = AVAudioUnitEQFilterTypeParametric; 
filterParameters.frequency = pitch; 
filterParameters.bandwidth = 1.0; 
filterParameters.gain = 20.0f; 
filterParameters.bypass = FALSE; 

filterParameters = _unitEq.bands[1]; 
filterParameters.filterType = AVAudioUnitEQFilterTypeParametric; 
filterParameters.frequency = pitch; 
filterParameters.bandwidth = 1.0; 
filterParameters.gain = 20.0f; 
filterParameters.bypass = FALSE; 

filterParameters = _unitEq.bands[2]; 
filterParameters.filterType = AVAudioUnitEQFilterTypeParametric; 
filterParameters.frequency = pitch; 
filterParameters.bandwidth = 1.0; 
filterParameters.gain = 20.0f; 
filterParameters.bypass = FALSE; 

filterParameters = _unitEq.bands[3]; 
filterParameters.filterType = AVAudioUnitEQFilterTypeParametric; 
filterParameters.frequency = pitch; 
filterParameters.bandwidth = 1.0; 
filterParameters.gain = 20.0f; 
filterParameters.bypass = FALSE; 

filterParameters = _unitEq.bands[4]; 
filterParameters.filterType = AVAudioUnitEQFilterTypeParametric; 
filterParameters.frequency = pitch; 
filterParameters.bandwidth = 1.0; 
filterParameters.gain = 20.0f; 
filterParameters.bypass = FALSE; 

filterParameters = _unitEq.bands[5]; 
filterParameters.filterType = AVAudioUnitEQFilterTypeParametric; 
filterParameters.frequency = pitch; 
filterParameters.bandwidth = 1.0; 
filterParameters.gain = 20.0f; 
filterParameters.bypass = FALSE; 

filterParameters = _unitEq.bands[6]; 
filterParameters.filterType = AVAudioUnitEQFilterTypeParametric; 
filterParameters.frequency = pitch; 
filterParameters.bandwidth = 1.0; 
filterParameters.gain = 20.0f; 
filterParameters.bypass = FALSE; 

filterParameters = _unitEq.bands[7]; 
filterParameters.filterType = AVAudioUnitEQFilterTypeParametric; 
filterParameters.frequency = pitch; 
filterParameters.bandwidth = 1.0; 
filterParameters.gain =20.0f; 
filterParameters.bypass = FALSE; 

filterParameters = _unitEq.bands[8]; 
filterParameters.filterType = AVAudioUnitEQFilterTypeParametric; 
filterParameters.frequency = pitch; 
filterParameters.bandwidth = 1.0; 
filterParameters.gain = 20.0f; 
filterParameters.bypass = FALSE; 

filterParameters = _unitEq.bands[9]; 
filterParameters.filterType = AVAudioUnitEQFilterTypeParametric; 
filterParameters.frequency = pitch; 
filterParameters.bandwidth = 1.0; 
filterParameters.gain =20.0f; 
filterParameters.bypass = FALSE; 


filterParameters = _unitEq.bands[10]; 
filterParameters.filterType = AVAudioUnitEQFilterTypeLowPass; 
filterParameters.frequency = pitch; 
filterParameters.bypass = FALSE; 

filterParameters = _unitEq.bands[11]; 
filterParameters.filterType = AVAudioUnitEQFilterTypeHighPass; 
filterParameters.frequency = pitch; 
filterParameters.bypass = FALSE; 
[_audioEngine attachNode:_unitEq]; 

}

Answer 1

Вы должны заменить

[audioPlayerNode installTapOnBus:0 bufferSize:8192 format:_audioFile.processingFormat block:^(AVAudioPCMBuffer *buffer, AVAudioTime *when) { 
 
      NSLog(@"Buffer Size = %@",buffer); 
 
      NSLog(@"when = %lld",when.sampleTime); 
 
      NSLog(@"outputfile length = %lli",_outputFile.length); 
 
      NSLog(@"input file length = %lld",_audioFile.length); 
 
      if (_outputFile.length<=_audioFile.length) 
 
      { 
 
       NSError *error; 
 

 
       [_outputFile writeFromBuffer:buffer error:&error]; 
 

 
       if (error) 
 
       { 
 
        NSLog(@"writebuffererror =%@",error); 
 
       } 
 
      } 
 
      else 
 
      { 
 
       NSError *error2; 
 

 

 

 
       [audioPlayerNode removeTapOnBus:0]; 
 

 
       // player2 = [[AVAudioPlayer alloc] initWithContentsOfURL:[self testFilePathURL] error:&error2]; 
 
       //player2.delegate = self; 
 

 
       NSLog(@"Pathththt = %@",[self testFilePathURL]); 
 
       NSLog(@"error = %@",error2); 
 
       [audioPlayerNode scheduleFile:_outputFile atTime:nil completionHandler:nil]; 
 

 

 
       [audioPlayerNode play]; 
 
       // [self toMp3]; 
 
      } 
 

 
     }]; 
 
    }

С

Здесь ввода означает audioEngine.inputnode

AVAudioInputNode *input = [audioEngine inputNode]; 
 
AVAudioFormat *format = [input outputFormatForBus: 0]; 
 

 
outputFile = [[AVAudioFile alloc] initForWriting:[self testFilePathURL] settings:recordSetting error:&error]; 
 
    if (error) 
 
    { 
 
     // NSLog(@"outputFile error = %@",error); 
 
      
 
    } 
 
    else 
 
    { 
 
     //  dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void) 
 
     //  { 
 
     [input installTapOnBus:0 bufferSize:8091 format:format block:^(AVAudioPCMBuffer * _Nonnull buffer, AVAudioTime * _Nonnull when) { 
 
      
 
      
 
      if (outputFile.length<audioFile.length) 
 
      { 
 
       
 
       NSError *error; 
 
       [outputFile writeFromBuffer:buffer error:&error]; 
 
       if (error) 
 
       { 
 
        NSLog(@"writebuffererror =%@",error); 
 
        
 

 
       } 
 
      } 
 
      else 
 
      { 
 
       
 
       activityMainView.hidden=YES; 
 
       
 
       [input removeTapOnBus:0]; 
 
       
 
       // [self savingAudioFile]; 
 
       
 
       
 
       //_doneButtonImageView.image=[UIImage imageNamed:@"save"]; 
 
       [self doneButtonClick:nil]; 
 
       NSError *error2; 
 
       NSLog(@"Pathththt = %@",[self testFilePathURL]); 
 
       NSLog(@"error = %@",error2); 
 
       
 
       
 
       
 
      } 
 
      
 
      
 
      
 
     }]; 
 
     
 
     
 
      
 
     //  }); 
 
     
 
     
 
    }