cutting a wave file

Question

How can i cut a .wave file using java ?

What i want is :

when the user presses the button labeled cut it should cut the audio from the previous mark (in nanoseconds) to the current position in nanoseconds. (mark is positioned to the current position in nanoseconds after the sound is cut) After i get that piece of audio,i want to save that piece of audio file.

// obtain an audio stream 
long mark = 0; // initially set to zero
//get the current position in nanoseconds
// after that how to proceed ?
// another method ?

How can i do that ?

Answer 1

This has originally been answered by Martin Dow

import java.io.*;
import javax.sound.sampled.*;

class AudioFileProcessor {

public static void main(String[] args) {
  copyAudio("/tmp/uke.wav", "/tmp/uke-shortened.wav", 2, 1);
}

public static void copyAudio(String sourceFileName, String destinationFileName, int startSecond, int secondsToCopy) {
AudioInputStream inputStream = null;
AudioInputStream shortenedStream = null;
try {
  File file = new File(sourceFileName);
  AudioFileFormat fileFormat = AudioSystem.getAudioFileFormat(file);
  AudioFormat format = fileFormat.getFormat();
  inputStream = AudioSystem.getAudioInputStream(file);
  int bytesPerSecond = format.getFrameSize() * (int)format.getFrameRate();
  inputStream.skip(startSecond * bytesPerSecond);
  long framesOfAudioToCopy = secondsToCopy * (int)format.getFrameRate();
  shortenedStream = new AudioInputStream(inputStream, format, framesOfAudioToCopy);
  File destinationFile = new File(destinationFileName);
  AudioSystem.write(shortenedStream, fileFormat.getType(), destinationFile);
} catch (Exception e) {
  println(e);
} finally {
  if (inputStream != null) try { inputStream.close(); } catch (Exception e) { println(e); }
  if (shortenedStream != null) try { shortenedStream.close(); } catch (Exception e) { println(e); }
 }
}

}

Originally answered HERE