سؤال فى عمل video record

السلام عليكم ورحمة الله

.. عندى مشكلة عندما أقو م بعمل video record ثم عندما اعمل play فإن الصورة فقط هى التى تشتغل ولكن لا يوجد صوت

...هذا مثال للكود الذى استخدمه:::::

public void startRecording() {

        try {
            player = Manager.createPlayer("capture://video");
            player.addPlayerListener(this);
            player.realize();

            //setup recording
            while (true) {
                record = (RecordControl) player.getControl("RecordControl");
                record.setRecordSizeLimit(15000);
                conn = (FileConnection) Connector.open(PATH, Connector.READ_WRITE);
                if (!conn.exists()) {
                    conn.create();
                }
                stream = conn.openOutputStream();
                record.setRecordStream(stream);

                //read the data from the file to the data buffer "pngData"
                ins = conn.openInputStream();
                ins.read(pngData);
                setData(pngData);

                // Grab the video control and set it to the current display.
                control = (VideoControl) player.getControl("VideoControl");
                if (control != null) {
                    control.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, this);
                    control.setDisplaySize(getWidth(), getHeight());
                    control.setVisible(true);
                }

                player.start();
                record.startRecord();
                Thread.sleep(1000);
            }
        } catch (Exception e) {
            Alert erro = new Alert("Erro", e.toString(), null, AlertType.ERROR);
            Display.getDisplay(midlet).setCurrent(erro);
            e.printStackTrace();
        }
    }