audio - OpenAL Sound don't play normally in Java -

i write program use openal , run. however, sound don't play normally.

the sound played in amazing speed. also, sound become noisy if change pitch of sound. what's that?

code.　i consulted source cord exists in lower url.

http://wiki.lwjgl.org/wiki/openal_tutorial_1_-_single_static_source

package other; import java.io.bufferedinputstream; import java.io.fileinputstream; import java.io.filenotfoundexception; import java.io.ioexception; import java.nio.floatbuffer; import java.nio.intbuffer;  import org.lwjgl.bufferutils; import org.lwjgl.lwjglexception;  import org.lwjgl.openal.al; import org.lwjgl.openal.al10; import org.lwjgl.openal.al11; import org.lwjgl.util.wavedata;  public class music { /** position of source sound. */ floatbuffer sourcepos;  /** velocity of source sound. */ floatbuffer sourcevel;  /** position of listener. */ floatbuffer listenerpos;  /** velocity of listener. */ floatbuffer listenervel;  /** orientation of listener. (first 3 elements "at", second 3 "up") */ floatbuffer listenerori;  /** buffers hold sound data. */ intbuffer buffer;  /** sources points emitting sound. */ intbuffer source;  public music() {   /** buffers hold sound data. */   buffer = bufferutils.createintbuffer(1);    /** sources points emitting sound. */   source = bufferutils.createintbuffer(1);    /** position of source sound. */   sourcepos = bufferutils.createfloatbuffer(3).put(new float[] { 0.0f, 0.0f, 0.0f});    /** velocity of source sound. */   sourcevel = bufferutils.createfloatbuffer(3).put(new float[] {0.0f, 0.0f, 0.0f });    /** position of listener. */   listenerpos = bufferutils.createfloatbuffer(3).put(new float[] {0.0f, 0.0f, 0.0f });    /** velocity of listener. */   listenervel = bufferutils.createfloatbuffer(3).put(new float[] {0.0f, 0.0f, 0.0f });    /** orientation of listener. (first 3 elements "at", second 3 "up") */   listenerori = bufferutils.createfloatbuffer(6).put(new float[] { 0.0f, 0.0f, -1.0f,  0.0f, 1.0f, 0.0f });  } int loadaldata()  {     sourcepos.rewind();      sourcevel.rewind();      // load wav data buffer.     al10.algenbuffers(buffer);      if(al10.algeterror() != al10.al_no_error)     {       return al10.al_false;     }      wavedata wavefile;     try {         //fileinputstream fin=new fileinputstream("18am01.wav");         fileinputstream fin=new fileinputstream("awaken.wav");         bufferedinputstream bin = new bufferedinputstream(fin);         wavefile = wavedata.create(bin);         al10.albufferdata(buffer.get(0), wavefile.format, wavefile.data, wavefile.samplerate);         wavefile.dispose();     } catch (filenotfoundexception e) {         // todo auto-generated catch block         e.printstacktrace();     }      // bind buffer source.     al10.algensources(source);      if (al10.algeterror() != al10.al_no_error)     {       return al10.al_false;     }      al11.alsource(source.get(0), al10.al_buffer,   buffer);     al10.alsourcef(source.get(0), al10.al_pitch,    1.0f        );     al10.alsourcef(source.get(0), al10.al_gain,     1.0f        );     al10.alsource (source.get(0), al10.al_position, sourcepos   );     al10.alsource (source.get(0), al10.al_velocity, sourcevel   );     //al10.alsourcef(source.get(0), al11.al_speed_of_sound,100.5f);     // error check , return.     if (al10.algeterror() == al10.al_no_error)     {       return al10.al_true;     }      return al10.al_false; } /**  * void setlistenervalues()  *  *  defined values listener, need  *  tell openal use data. function that.  */ void setlistenervalues() {    listenerpos.rewind();   listenervel.rewind();   listenerori.rewind();    al10.allistener(al10.al_position,    listenerpos);   al10.allistener(al10.al_velocity,    listenervel);   al10.allistener(al10.al_orientation, listenerori); }  /**  * void killaldata()  *  *  have allocated memory our buffers , sources needs  *  returned system. function frees memory.  */ void killaldata() {   al10.aldeletesources(source);   al10.aldeletebuffers(buffer); }  public void execute() {       // initialize openal , clear error bit.       try{         al.create();       } catch (lwjglexception le) {         le.printstacktrace();         return;       }       al10.algeterror();        // load wav data.       if(loadaldata() == al10.al_false) {         system.out.println("error loading data.");         return;       }         setlistenervalues();       // loop.       char c = ' ';       while(c != 'q') {         try {          c = (char) system.in.read();         } catch (ioexception ioe) {           c = 'q';       }       switch(c) {         // pressing 'p' begin playing sample.         case 'p':              al10.alsourceplay(source.get(0));             break;     // pressing 's' stop sample playing.         case's': al10.alsourcestop(source.get(0)); break;          // pressing 'h' pause sample.         case 'h': al10.alsourcepause(source.get(0)); break;       };       }     killaldata();  } public static void main(string[] args) {     music music= new music();     music.execute(); } 

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