This way one could check the curve/form of a modulation without using the OUT(n) connections and by this needing to disable the normal connection for this purpose. Furthermore those "OUT"-connections are always influenced by the volume-envelope which leads to incorrect results. For example try to display a LFO with a straight square-wave. It's not possible. Well, at least if I haven't overlooked something...
Edit: Of course this connection should override/switch the normal wave off to prevent from confusion.


