Behringer high performance 32 channel usb firewire expansion card for x32 behringer x uf expand your x32 mixers recording capability with the 32 channel x uf audio interface expansion card multitrack record live or studio performances straight to your computer over firewire or optimized usb 2 0 the 24 bit bi directional signal flow and advanced driver support ensure your results sound their best going in and coming out of your computer run virtual sound checks by playing back audio track