“Hidden” is relative to the operator as is “not possible.” I kindly invite you to spend more time troubleshooting the configuration of the ASIO external gear plug-in in connection with audio streaming settings (playback, recording, ASIO plug-ins). Setting it all up is indeed a perplexing endeavor (this section of Wavelab needs basic re-thinking in the direction of intuitiveness and simplification, Cubase is more advanced and more streamlined in this respect).