playing WAV file over GSM modem

Question

I want to play a WAV file over GSM modem. Here is my sample code

private final int BUFFER_SIZE = 8;
private File soundFile;
private AudioInputStream audioStream;
private AudioFormat audioFormat;
public void playSound(String filename) throws IOException{

    String strFilename = filename;

    try {
        soundFile = new File(strFilename);
    } catch (Exception e) {
        e.printStackTrace();
        System.exit(1);
    }

    try {
        audioStream = AudioSystem.getAudioInputStream(soundFile);
    } catch (Exception e){
        e.printStackTrace();
        System.exit(1);
    }

    audioFormat = audioStream.getFormat();

    DataLine.Info info = new DataLine.Info(SourceDataLine.class, audioFormat);

    int nBytesRead = 0;
    byte[] abData = new byte[BUFFER_SIZE];
    while (nBytesRead != -1) {
        try {
            nBytesRead = audioStream.read(abData);
        } catch (IOException e) {
            e.printStackTrace();
        }
        if (nBytesRead >= 0) {
            outputStream.write(abData, 0, nBytesRead);
            outputStream.flush();
        }
    }
}

But the problem is the WAV file sending through serial port is playing very fast. I don't know what's the problem . Here is my WAV file description:

ULAW 8000.0 Hz, 8 bit, mono, 1 bytes/frame, Audio Sample Rate 8Khz.

Can anyone help me to solve the issue?

Answer 1

I would check the following - especially #3.

1. Synchronization
2. AudioFormat
3. JSSRC Resampling Library

Answer 2

How about sleeping a while after "outputStream.flush();"
might be Thread.sleep(50)