Source position Top and Bottom in OpenAL - audio

Question

I tried to put the source position top and bottom this way:
top:
sourcePos[0]=0f;
sourcePos[1]=-1f;
sourcePos[2]=0f;
bottom:
sourcePos[0]=0f;
sourcePos[1]=1f;
sourcePos[2]=0f
Unfortunately, they seem to be indistinguishable. Moreover, if I change the sourcePos[1] to any other value, I still do not detect any change in the audio.
However, sourcePos[0] and sourcePos[2] work fine. Why the second position in the source position array does not take any effect?
Can anyone help me with this? Thanks in advance.
Here is the full code:
import com.jogamp.openal.*;
import com.jogamp.openal.util.*;
import java.io.*;
import java.nio.ByteBuffer;
public class SingleStaticSource {
static AL al = ALFactory.getAL();
// Buffers hold sound data.
static int[] buffer = new int[1];;
// Sources are points emitting sound.
static int[] source = new int[1];
// Position of the source sound.
static float[] sourcePos = { 0f, 0.0f, 0.0f };
// Velocity of the source sound.
static float[] sourceVel = { 0.0f, 0.0f, 0.0f };
// Position of the listener.
static float[] listenerPos = { 0.0f, 0.0f, 0.0f };
// Velocity of the listener.
static float[] listenerVel = { 0.0f, 0.0f, 0.0f };
// Orientation of the listener. (first 3 elements are "at", second 3 are "up")
static float[] listenerOri = { 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f };
static int loadALData() {
// variables to load into
int[] format = new int[1];
int[] size = new int[1];
ByteBuffer[] data = new ByteBuffer[1];
int[] freq = new int[1];
int[] loop = new int[1];
// Load wav data into a buffer.
al.alGenBuffers(1, buffer, 0);
if (al.alGetError() != AL.AL_NO_ERROR)
return AL.AL_FALSE;
ALut.alutLoadWAVFile("wavdata/FancyPants.wav", format, data, size, freq, loop);
al.alBufferData(buffer[0], format[0], data[0], size[0], freq[0]);
// Bind buffer with a source.
al.alGenSources(1, source, 0);
if (al.alGetError() != AL.AL_NO_ERROR)
return AL.AL_FALSE;
al.alSourcei (source[0], AL.AL_BUFFER, buffer[0] );
al.alSourcef (source[0], AL.AL_PITCH, 1.0f );
al.alSourcef (source[0], AL.AL_GAIN, 1.0f );
al.alSourcefv(source[0], AL.AL_POSITION, sourcePos, 0);
al.alSourcefv(source[0], AL.AL_VELOCITY, sourceVel, 0);
al.alSourcei (source[0], AL.AL_LOOPING, loop[0] );
// Do another error check and return.
if(al.alGetError() == AL.AL_NO_ERROR)
return AL.AL_TRUE;
return AL.AL_FALSE;
}
static void setListenerValues() {
al.alListenerfv(AL.AL_POSITION, listenerPos, 0);
al.alListenerfv(AL.AL_VELOCITY, listenerVel, 0);
al.alListenerfv(AL.AL_ORIENTATION, listenerOri, 0);
}
static void killALData() {
al.alDeleteBuffers(1, buffer, 0);
al.alDeleteSources(1, source, 0);
ALut.alutExit();
}
public static void main(String[] args) {
// Initialize OpenAL and clear the error bit.
ALut.alutInit();
al.alGetError();
// Load the wav data.
if (loadALData() == AL.AL_FALSE)
System.exit(-1);
setListenerValues();
// Setup an exit procedure.
Runtime runtime = Runtime.getRuntime();
runtime.addShutdownHook(
new Thread(
new Runnable() {
public void run() {
killALData();
}
}
)
);
char[] c = new char[1];
while(c[0] != 'q') {
try {
BufferedReader buf =
new BufferedReader(new InputStreamReader(System.in));
System.out.println("Press a key and hit ENTER: " +
"'p' to play, 's' to stop, 'h' to pause and 'q' to quit");
buf.read(c);
switch(c[0]) {
case 'p':
// Pressing 'p' will begin playing the sample.
al.alSourcePlay(source[0]);
break;
case 's':
// Pressing 's' will stop the sample from playing.
al.alSourceStop(source[0]);
break;
case 'h':
// Pressing 'n' will pause (hold) the sample.
al.alSourcePause(source[0]);
break;
}
} catch (IOException e) {
System.exit(1);
}
}
}
} // class SingleStaticSource