Hello World Duplex not working for me

[mayukhnair]

javax.sound.sampled.LineUnavailableException: line with format PCM_SIGNED 8000.0 Hz, 16 bit, mono, 2 bytes/frame, little-endian not supported.
at com.sun.media.sound.DirectAudioDevice$DirectDL.implOpen(DirectAudioDevice.java:513)
at com.sun.media.sound.AbstractDataLine.open(AbstractDataLine.java:121)
at com.sun.media.sound.AbstractDataLine.open(AbstractDataLine.java:153)
at com.darkprograms.speech.microphone.Microphone.open(Microphone.java:191)
at com.darkprograms.speech.microphone.Microphone$CaptureThread.run(Microphone.java:227)
at java.lang.Thread.run(Thread.java:744)

Do note that no other application is using the microphone right now.

Here is my code:

 Thread MicInputThread=new Thread(new Runnable(){
        public void run(){
            duplo.addResponseListener(new GSpeechResponseListener(){
                public void OnResponse(GoogleResponse googres){
                    String parsedtext=googres.getResponse();
                    System.out.println(parsedtext);
                }

                @Override
                public void onResponse(GoogleResponse gr) {
                    throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
                }
            });
            micra=new Microphone(FLACFileWriter.FLAC);
            audiofil=new File("AudioTest.flac");
            while(true){
                try{
                    micra.captureAudioToFile(audiofil);
                    Thread.sleep(5000);
                    micra.close();
                    byte[] data=Files.readAllBytes(micra.getAudioFile().toPath());
                    duplo.recognize(data, (int)micra.getAudioFormat().getSampleRate());
                    micra.getAudioFile().delete();
                }
                catch (Exception ex){
                    ex.printStackTrace();
                }
            }
        }
    });
   MicInputThread.start();
}                                        

Is it possible that this line of code byte[] data=Files.readAllBytes(micra.getAudioFile().toPath()); may be the culprit?

[Skylion007]

No, the line unavailable yada yada means there is something wrong microphone on your device. The JVM cannot access. Either you are trying to access in a blocking manner from multiple threads or it's not properly detected or something along those lines. It has nothing to do with the Speech API's underlying code except maybe in the Microphone class. Your microphone may also just not support the required format in which case you will need to tweak the audio format settings in the Microphone class.