private void testFakeAudio() {
        /**
         * Tests AudioRenderer.playSource() with an
         * AudioNode lacking AudioData to observe its handling (typically discard).
         */
        AudioNode fakeAudio = new AudioNode() {
            @Override
            public String toString() {
                // includes node name for easier identification in log messages.
                return getName() + " (" + AudioNode.class.getSimpleName() + ")";
            }
        };
        fakeAudio.setName("FakeAudio");
        audioRenderer.playSource(fakeAudio);
        audioRenderer.playSourceInstance(fakeAudio);
    }
java.lang.UnsupportedOperationException: Cannot play instances of audio streams. Use play() instead.
	at com.jme3.audio.openal.ALAudioRenderer.playSourceInstance()
jme3-examples/src/main/java/jme3test/audio/TestWav.java