I built my own midi controller, based on the midibox opensource framework.
the project sits there: http://www.julienbayle.net/diy/protodeck
I began to make a big documentation about the patch I use as an interface between Live and the hardware:
http://www.julienbayle.net/diy/protodeck/#m4L
it could be useful for people.
features are:
- mapping between pots and multiple parameters of the liveset
- mapping between buttons and multiple parameters of the liveset
- mapping between multiple parameters and rgb leds of the protodeck
- full integrated clip control with scrolling through the live set (for feedback and action)
- full feedback from clips state to leds
- automatic chain selection for automatic instruments change mapped with the current song playing
- midi notes feedback for observing each track midi activities
- send/return ratio control for each tracks
- send/return channel fx racks control
- beat feedback
- fx control
... and some subpatch to make exactly what I need.