소스는 다음과 같구요

public class AudioRecordTest extends Activity {
   
 MediaRecorder recorder = new MediaRecorder();
 
 String path;
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
   
        path = "";
        File file = Environment.getExternalStorageDirectory();
        path = file.getAbsolutePath() + "/test1.3gp";
       
       
       
       
        Button btnStart = (Button)findViewById(R.id.record_start);
        btnStart.setOnClickListener(new OnClickListener() {
   

//녹음 시작
   @Override
   public void onClick(View v) {
    
  
    
    try{
     
              recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
              recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
              recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
              //recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
              recorder.setOutputFile(path);
              recorder.prepare();
              recorder.start();
     
    } catch(IOException e){
     e.printStackTrace();
    }
    
   }
  });
       
        Button btnStop = (Button)findViewById(R.id.record_stop);
        btnStop.setOnClickListener(new View.OnClickListener() {

//녹음 정지   
   @Override
   public void onClick(View v){
    
    
    recorder.stop();
    recorder.release();
       
   }
  });
       
        Button btnPlay = (Button)findViewById(R.id.play_music);
        btnPlay.setOnClickListener(new View.OnClickListener() {

//재생   
   @Override
   public void onClick(View v) {
    MediaPlayer mp = new MediaPlayer();
    
    try {
     mp.setDataSource(path);
    } catch (IllegalArgumentException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    } catch (IllegalStateException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
    
    try {
     mp.prepare();
    } catch (IllegalStateException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
    
    mp.start();
   }
  });
       
       
       
    }
}

소스는 위와 같구요. 녹음이 제대로 되는데.. 녹음한걸 틀면 느리게 재생됩니다.

웃긴건 에뮬에서 기본 제공하는 녹음기로 녹음을 해도 그걸 재생하면 느리게 재생 된다는 겁니다..

도대체 왜 느려지는지 모르겠습니다.. 알려주세요!!