public void link(int audioSessionId){ //audioSessionId is from mediaplayer.getAudioSessionId
            try {
                mVisualizer = new Visualizer(audioSessionId);
            } catch (Exception e) {
                L.e("Error enabling visualizer!" + e.getMessage());
                return;
            }
            mVisualizer.setEnabled(false);
            mVisualizer.setCaptureSize(Visualizer.getCaptureSizeRange()[1]);

            // Pass through Visualizer data to VisualizerView
            Visualizer.OnDataCaptureListener captureListener = new Visualizer.OnDataCaptureListener() {
                @Override
                public void onWaveFormDataCapture(Visualizer visualizer, byte[] bytes,int samplingRate) {
                    updateVisualizer(bytes);
                }

                @Override
                public void onFftDataCapture(Visualizer visualizer, byte[] bytes, int samplingRate) {
                    updateVisualizerFFT(bytes);
                }
            };

            mVisualizer.setDataCaptureListener(captureListener,
                    Visualizer.getMaxCaptureRate() / 2, true, true);
}

public void updateVisualizer(byte[] bytes) {
        mBytes = bytes;

        for(int i = 0; i < bytes.length; i++) {
            if (bytes[i]!=-128) {
                L.e( "Found Nonzero sample "+bytes[i]);
                break;
            }
        }
        invalidate();
}