en la pagina de focusrite lo pone muy claro
http://global.focusrite.com/usb-audio-interfaces/scarlett-8i6/downloads
Scarlett 8i6 iPad Mappings
09/11/2012
Click here for more details:
To use the Scarlett 8i6/18i6 with an iPad follow these instructions:
Download the Scarlett Mix Control iPad mappings found on this page
From Scarlett Mix Control select File->Open
Load the required mapping
With the 8i6/18i6 connected, select File->Save to Hardware
You may now connect the 8i6/18i6 to an iPad via the camera connection kit
N.B. The 8i6/18i6 is not bus powered and requires the supplied external PSU at all times