We start by connecting your iPad to your computer.
If you're using a MAC, open "Audio Midi Setup" and the Network Settings.
If you're on a Windows computer, use the free rtpMidi software by Tobias Erichsen.
Make sure you have a Midi Session. If not, create a new one and give it an appropriate name.
Start the m.phase Application.
You should now see your iPad in the Midi Setup dialog on your computer.
Select your iPad and connect it to your computer.
Connect your iPad as a Mackie Control to your Live software.
Do this by opening the Preferences dialog in your DAW.
Now open the MIDI section of your preferences dialog, add a new Mackie Control
and provide your MIDI Session as an Input and Output.
That's it, you're ready to go!