Yes, Matrix (and AWS) can be integrated with X-Rack.
All of the switch and rotary X-Rack controls can be stored along with Matrix's recall objects.
Currently you can connect up to four X-Racks to Matrix.
This will be expanded to six in a future software release. Each X-Rack is supplied with a 2 meter 9 way D type serial cable to allow connection to Matrix.
This may be extended to a maximum of 15 metres using a suitable pin to pin extension cable.