Dear foodradio,
Unfortunately this wont be possible. I am not 100% familiar with the X32 but I suppose the USB port on the X32 can be used to connect it to a PC/Mac in order to use it as a USB interface.
The good news is that we are soon releasing a MADI card for the uTrack 24 (Q2) and since there is also a MADI card for the X32 this might be an option for you if you want to avoid the analogue ins/outs.
Sven