Connecting Multiple Devices to iPad w/ Camera Connection Kit

Title says it all.

More specifically, in addition to an iPad 2, I have a Novation Launch Control XL and an Akai LPK25 (music-making hardware). The former has only knobs/faders, and the latter has only keys. But I want to control music apps with knobs/faders while also being able to play on my keys, *simultaneously*.

Since both these devices must be connected to the iPad via the Camera Connection Kit (neither has WiFi, and I can't afford fancier solutions, like the Alesis i/o Dock), is there some way that I can connect them both at the same time?