Basic Steps :
//initialize source data line - for playback
SourceDataLine line = AudioSystem.getSourceDataLine(audioFormat);
line.open(audioFormat);
line.start();
//play the byteArray
line.write(byteArray, 0, byteArray .length);//(byte[] b, int off, int len)
line.drain();
line.close();
Converting integer array to bytearray :
We need to convert our PCM array to byteArray because the line.write requires byte[] b as parameter.
byte b = (byte)(i*127f);
Full code : This example plays the randomly generated array :
public class PlayAnArray {
private static int sampleRate = 16000;
public static void main(String[] args) {
try {
final AudioFormat audioFormat = new AudioFormat(sampleRate, 8, 1, true, true);
SourceDataLine line = AudioSystem.getSourceDataLine(audioFormat );
line.open(audioFormat );
line.start();
for (int i = 0; i < 5; i++) {//repeat in loop
play(line, generateRandomArray());
}
line.drain();
line.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private static byte[] generateRandomArray() {
int size = 20000;
System.out.println(size);
byte[] byteArray = new byte[size];
for (int i = 0; i < size; i++) {
byteArray[i] = (byte) (Math.random() * 127f);
}
return byteArray;
}
private static void play(SourceDataLine line, byte[] array) {
int length = sampleRate * array.length / 1000;
line.write(array, 0, array.length);
}
}
You may modify generateRandomArray to play different waveforms like SINE wave, square wave... etc
For playing a wave file in java follow my post on How to play wave file on java
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