From Musical Fidelity X-Canv8 Manual
Computer setup for input USB input
A good quality USB A to B cable is required to connect the unit to the computer (not supplied). Plug the B (square) end into the socket in the back of the X-CAN V8 Plug the A (rectangle) end into a free USB socket on the computer. The computer should detect the new hardware and install a generic driver automatically (No setup or driver disk required). CD, MP3, WAV files played on any software should now play through the X-CAN V8. This device has been designed to work with PC Windows 98, ME, 2000, XP as well as Apple Macintosh OS X.
This device is a high speed serial data processor, and by its nature, requires a very high volume of USB bandwidth. It will benefit greatly from being the only device connected on its USB ‘bus’. Sharing the same bus with other devices may cause unwanted artifacts such as dropouts or temporary loss of signal. This especially includes the use of the X-CAN V8 on a USB hub/splitter alongside other USB components.
Dropouts in sound (USB input) Shared USB port with another device
Computer busy with another application or Computer low on resources
Avoid sharing the USB port with other devices, if possible. At times an application (program) may intervene, sometimes invisibly e.g. a virus scanner. When this happens, computer resources are temporarily used up, and playback may suffer. This is not a fault. Try running fewer applications if possible.