code: public static AudioInputStream setupAudioStream (InputStream in)
          throws UnsupportedAudioFileException, IOException
      {
          AudioInputStream stream = AudioSystem.getAudioInputStream(in);
          AudioFormat format = stream.getFormat();
          if (format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {
              stream = AudioSystem.getAudioInputStream(
                  new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
                                  format.getSampleRate(),
                                  16,
                                  format.getChannels(),
                                  format.getChannels() * 2,
                                  format.getSampleRate(),
                                  false), stream);
          }
  
          return stream;
      }
docs: Sets up an audio stream from the given byte array, and gets it to convert itself to PCM
  data for writing to our output line (if it isn't already that)