Well, before with ASIO you had to choose either the Axe or the interface as the soundcard. If it was the Axe, you could easily reamp because you could record the wet track (output 1/2) and a clean track for reamp (output 3/4). But that was it, you couldn't have any input through the other interface. If you chose the other input for mic's, vocals etc, you could only run spdif or analog output from Axe which is output 1/2 only. Now with WDM drivers you can select output 1/2 AND output 3/4 from the axe AND any source from your interface at the same time as input source for your recording tracks. Very cool.