http://sungho0459.blog.me/40143861825

at = new AudioTrack(    AudioManager.STREAM_MUSIC,    sample_rate,  channel_count,audio.ENCODING_BIT, 

                                                      audioTrackMinBufferSize,    AudioTrack.MODE_STREAM);

http://www.brokenteapotstudios.com/android-game-development-blog/2011/10/playing-a-wav-pcm-sample-with-audiotrack.html

http://darksilber.tistory.com/61

http://www.badlogicgames.com/wordpress/?p=228

https://groups.google.com/forum/#!topic/android-developers/TK_40yFx-L8

http://stackoverflow.com/questions/3305598/android-audiotrack-buffering-problems  <<===Good

http://stackoverflow.com/questions/20511144/using-a-buffer-with-android-audiotrack

http://stackoverflow.com/questions/18794965/android-audio-programming-nightmare-soundpool-audiotrack-arrghh

http://stackoverflow.com/questions/9409811/audiorecorder-in-android-error-invalid-buffer-size