我正在尝试使用TarsosDSP库来检测.wav文件中的音高，而频率的结果始终小于一半。
这是我的代码。
public class Main {
public static void main(String[] args){
try{
float sampleRate = 44100;
int audioBufferSize = 2048;
int bufferOverlap = 0;
//Create an AudioInputStream from my .wav file
URL soundURL = Main.class.getResource("/DetectPicthFromWav/329.wav");
AudioInputStream stream = AudioSystem.getAudioInputStream(soundURL);
//Convert into TarsosDSP API
JVMAudioInputStream audioStream = new JVMAudioInputStream(stream);
AudioDispatcher dispatcher = new AudioDispatcher(audioStream, audioBufferSize, bufferOverlap);
MyPitchDetector myPitchDetector = new MyPitchDetector();
dispatcher.addAudioProcessor(new PitchProcessor(PitchEstimationAlgorithm.YIN, sampleRate, audioBufferSize, myPitchDetector));
dispatcher.run();
}
catch(FileNotFoundException fne){fne.printStackTrace();}
catch(UnsupportedAudioFileException uafe){uafe.printStackTrace();}
catch(IOException ie){ie.printStackTrace();}
}
}
class MyPitchDetector implements PitchDetectionHandler{
//Here the result of pitch is always less than half.
@Override
public void handlePitch(PitchDetectionResult pitchDetectionResult,
AudioEvent audioEvent) {
if(pitchDetectionResult.getPitch() != -1){
double timeStamp = audioEvent.getTimeStamp();
float pitch = pitchDetectionResult.getPitch();
float probability = pitchDetectionResult.getProbability();
double rms = audioEvent.getRMS() * 100;
String message = String.format("Pitch detected at %.2fs: %.2fHz ( %.2f probability, RMS: %.5f )\n", timeStamp,pitch,probability,rms);
System.out.println(message);
}
}
}
329.wav文件是从http://onlinetonegenerator.com/网站以329Hz生成的。
我不知道为什么结果音高总是164.5Hz。我的代码有什么问题吗？
最佳答案
好吧，我不知道您使用的是哪种方法，但是通过查看频率如何精确地减半，可能是设置了错误的采样率的问题？
大多数操作都假设对信号进行采样时的初始采样率，也许您已经将其作为参数(或其默认值)传递了一半？