UACC
Spitfire Audio has created a new articulation switching method, known as the UACC (Universal Articulation Controller Channel), to be used as a standard across their libraries.
It's currently at v2 (as of May 2014).
For more information on the nuts and bolts of how it works, and the philosophy behind it, please see these links:
UACC - A New Proposed Standard
Tutorials - Spitfire Audio - Changing Articulations
TouchOSC
TouchOSC is an app for iOS and Android that relays OSC or MIDI values to a host DAW (via TouchOSC Bridge) over WiFi or USB.
Users may make various templates for their instruments/projects via a desktop program (TouchOSC Editor), and upload them to the mobile device that will be used as a controller.
For more information on how to setup TouchOSC, TouchOSC Editor and the TouchOSC Bridge applications, please see:
Template v1.0
With that out of the way, here is a template I've created for the iPad using the latest UACC spec and TouchOSC version to control Spitfire libraries.
Here are a couple of images of the template with some explanatory notations...
template overview
template zoom
Please use the above links as reference to how to properly load/utilize TouchOSC templates.
I am providing a download of the template below for anyone who is interested in controlling their Spitfire templates/instruments this way.
Please be sure you select "Locked to UACC" preference in the Kontakt performance view window (as seen below).
Kontakt Performance View - Select "Locked to UACC" for proper functioning.
I hope you find this tool useful and helpful in efficiently managing your Spitfire Audio workflow!