On Fri, 19 Jun 2015, Len Ovens wrote: > USB2 compliant. The xr16 is 2 channels and the xr18 is 18 channels. 48K at > 24bits for the xr18, I haven't really looked into the xr16. oops! Yeah, thats right the xr16 doesn't have USB. -- Len Ovens www.ovenwerks.net