添加效果录制音频

我读了很多帖子，并尝试了很多不同的方法，并最终来到实际工作的解决方案，这是从其他堆栈溢出帖子的休闲功能，添加效果并将其保存到文件，它会起到附加效果并保存它，但问题在于已保存的咖啡馆。文件不可读。我看到它在主目录上创建文件，但不能播放它。任何想法是什么原因造成的问题，将不胜感激添加效果录制音频

func playAudio(pitch : Float, rate: Float, reverb: Float, echo: Float) { 
    // Initialize variables 
    audioEngine = AVAudioEngine() 
    audioPlayerNode = AVAudioPlayerNode() 
    audioEngine.attachNode(audioPlayerNode) 

    // Setting the pitch 
    let pitchEffect = AVAudioUnitTimePitch() 
    pitchEffect.pitch = pitch 
    audioEngine.attachNode(pitchEffect) 

    // Setting the platback-rate 
    let playbackRateEffect = AVAudioUnitVarispeed() 
    playbackRateEffect.rate = rate 
    audioEngine.attachNode(playbackRateEffect) 

    // Setting the reverb effect 
    let reverbEffect = AVAudioUnitReverb() 
    reverbEffect.loadFactoryPreset(AVAudioUnitReverbPreset.Cathedral) 
    reverbEffect.wetDryMix = reverb 
    audioEngine.attachNode(reverbEffect) 

    // Setting the echo effect on a specific interval 
    let echoEffect = AVAudioUnitDelay() 
    echoEffect.delayTime = NSTimeInterval(echo) 
    audioEngine.attachNode(echoEffect) 

    // Chain all these up, ending with the output 
    audioEngine.connect(audioPlayerNode, to: playbackRateEffect, format: nil) 
    audioEngine.connect(playbackRateEffect, to: pitchEffect, format: nil) 
    audioEngine.connect(pitchEffect, to: reverbEffect, format: nil) 
    audioEngine.connect(reverbEffect, to: echoEffect, format: nil) 
    audioEngine.connect(echoEffect, to: audioEngine.mainMixerNode, format: nil) 


    // Good practice to stop before starting 
    audioPlayerNode.stop() 

    // Play the audio file 
    if(audioEngine != nil){ 
     audioEngine?.stop() 
    } 

    audioPlayerNode.scheduleFile(audioFile, atTime: nil, completionHandler: { 
     print("Complete") 

    }) 

    try! audioEngine.start() 


    let dirPaths: AnyObject = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)[0] 
    let tmpFileUrl: NSURL = NSURL.fileURLWithPath(dirPaths.stringByAppendingPathComponent("dddeffefsdctedSoundf23f13.caf")) 
    filteredOutputURL = tmpFileUrl 

    do{ 
     print(dirPaths) 
     print(tmpFileUrl) 

     self.newAudio = try! AVAudioFile(forWriting: tmpFileUrl, settings:[ 
      AVFormatIDKey: NSNumber(unsignedInt:kAudioFormatAppleLossless), 
      AVEncoderAudioQualityKey : AVAudioQuality.Medium.rawValue, 
      AVEncoderBitRateKey : 12800, 
      AVNumberOfChannelsKey: 2, 
      AVSampleRateKey : 44100.0 
      ]) 

     audioEngine.mainMixerNode.installTapOnBus(0, bufferSize: 2048, format: audioEngine.mainMixerNode.inputFormatForBus(0)) { 
      (buffer: AVAudioPCMBuffer!, time: AVAudioTime!) -> Void in 

      print(self.newAudio.length) 
      print("=====================") 
      print(self.audioFile.length) 
      print("**************************") 
      if (self.newAudio.length) < (self.audioFile.length){//Let us know when to stop saving the file, otherwise saving infinitely 

       do{ 
        //print(buffer) 
        try self.newAudio.writeFromBuffer(buffer) 
       }catch _{ 
        print("Problem Writing Buffer") 
       } 
      }else{ 
       self.audioEngine.mainMixerNode.removeTapOnBus(0)//if we dont remove it, will keep on tapping infinitely 

      } 

     } 
    }catch _{ 
     print("Problem") 
    } 

    audioPlayerNode.play()

来源

2016-08-30 ivan123

你需要刷新和关闭文件的音频文件，使文件CAF正确写出来。

眼看AVAudioFile不具备这样做明确的方法，你唯一的希望似乎选好后要设置newAudio至零，并希望正是在AVAudioFile的dealloc完成：

self.audioEngine.mainMixerNode.removeTapOnBus(0) 
       print("finish?") 
self.newAudio = nil // hopefully flush & close, if there are no other strong references

来源

2016-08-31 00:31:10

自我.newAudio = nil //解决了问题非常感谢 – ivan123

添加效果录制音频

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