There are lot of amazing media-related apps for your iPad but there are not a lot of accessories that push the limits of the iPad hardware, except this one – Alesis iO Pro Dock. It has everything an expert or a not-so-expert musician would ever want. It features 2x XLR inputs, MiDi in and out, footswitch input, 2x headphone outputs and video output.
There are two independent volume controls for the 2 headphone jacks on it. So, how does it works? Well, just slide your iPad / iPad 2 int the dock and connect your musical instrument into it (be it guitar, Midi instrument, bass – you name it). So, if you ever wanted to connect your MIDI keyboard with your iPad, this is the accessory you should have your eyes on.
The only thing not to like about it is the fact it needs AC power to function. Still, it is good enough for a mobile warrior. Check out their official webpage if you are interested.