I have tried the beta with the x32 mixer using usb to my pc.
On my pc I have Waves "Tracks Live" configured to send multitrack to the x32.
On the x32 I have 32 channels configured going through the same usb cable back to the PC.
On the PC is also have LightJams running that is receiving the multitracks from the x32 using the asio driver.
I have played a 20 track file with "Tracks live" and selected 8 of the incoming audio tracks in LightJams and connected them to sources.
It all works great.