@Override
    public void close() {
        if (in != null && open) {
            try {
                in.close();
            } catch (IOException ex) {
            }
            open = false;
        } else {
            throw new RuntimeException("AudioStream is already closed!");
        }
    }
Closes the stream, releasing all data relating to it. 
Reading from the stream will return eof.
jme3-core/src/main/java/com/jme3/audio/AudioStream.java