Create ReadAudioData.java

1) data1 is now 2-dimensional array (not 1-dimensional) 
static double[] [] data1 = new double[2] [MAX_NUMBER_OF_INPUT_POINTS]; 

2) 2 channels from stereo WAV-file are read (not just fisrt one): 
if (w.nSamples >= MAX_NUMBER_OF_INPUT_POINTS )  //WAV-file has more samples than we need in FFT 
{
   System.arraycopy(w._samples[0], 0, data1[0], 0, MAX_NUMBER_OF_INPUT_POINTS);
   System.arraycopy(w._samples[1], 0, data1[1], 0, MAX_NUMBER_OF_INPUT_POINTS);
}
else 
{
   System.arraycopy(w._samples[0],0,data1[0], 0, (int) w.nSamples);
   System.arraycopy(w._samples[1],0,data1[1], 0, (int) w.nSamples);
}