public void setOuterAngle(float outerAngle) {
        this.outerAngle = outerAngle;
        if (channel >= 0)
            getRenderer().updateSourceParam(this, AudioParam.OuterAngle);
    }
Set the directional audio node cone outer angle.
Does nothing if the audio node is not directional.

@param outerAngle The cone outer angle.
jme3-core/src/main/java/com/jme3/audio/AudioNode.java