Symphony Pro for iOS
Does this app work with a midi keyboard that is hooked up to the ipad2 with the cable called Line 6 MIDI Mobilizer?
Symphony Pro is only compatible with devices listed as Core Midi compatible, which is Apple's own interface. See
for a few examples.
Midi mobilizer requires apps to add compatibility just for the device. If there is enough demand or utility, we will definitely add support for it. Please fill me in on that if you can.