KMI Softstep 2 works with iTrack Dock, Loopy, iPad Air
I'm new to the forum. I thought this info might be useful to someone who's researching similar options.
I've been working toward a small-ish Guitar + iPad rig. These devices are working for me:
Focusrite iTrack Dock audio/MIDI interface,
Keith McMillan SoftStep 2 foot controller (USB into iTrack Dock USB Input),
The Softstep worked right out of the box. It has a few easy presets. One preset just sends a MIDI note for each pedal. One sends PCs, and a few send CCs for specific apps like Ableton LIve Session View. The Loopy Bindings screen responds to all of them.
I have more looping workflow details to work out, but I'm pretty excited to have a few devices communicating.
Incidentally, the Novation X-Station also sends MIDI data over USB through the iTrack Dock to Loopy. The Novation has 5-pin MIDI inputs, which can pass data over USB to iPad apps as well. That's potentially a platform for multiple controller devices if I get a MIDI extender for the SoftStep. But the iTrack Dock provides power to the iPad and makes for a slightly lighter rig when I don't carry the X-Station.
Hope that helps.