It is possible to reset either soundcard on the Xone 96 with the press and hold of a button. This is handy if you need to re-enumerate the soundcard device, without having to power-cycle the hardware. 

This can be action on either USB 1, or 2, or both simultaneously. Simply press and hold the corresponding MIDI active button for 5(+) seconds. The blue active LED will start to flash, and remain solid once reconnection to a host computer been established.

Above shows this being action on USB 2 of the 96 dual soundcard.