Focusrite iTrack Dock
2-channel Docking iPad Recording Interface with Lightning Connection that charges your I pad! Using a Novation Launchkey it talks both ways to ipad and all the keyboard changes show on the iPad and it uses the USB port on iDock and powers it also. Im using a Dito Looper into a Roland VT 3 with stereo outs pluged into the iDock and the volume is controlled with iDock. I have another ipad pluged in the instrument input with 1/8" to 1/4" TRS and the volume is controlled with ch 1 volume. So with the volume on the LaunchKey Im counting 4 volumes you can control and the Big Knob! This gives you quite a nice rig with iPad running without a computer! I have a picture posted off my rig on the Focusrite iDock on FaceBook! Way to Go Focusrite and Novation and you can use a iPad Pro with a lighting extender cable Woot Woot!
Oh I forgot it sounds GREAT if you have good PA!!!!