- If you are connecting with OSC (Wi-Fi only), you will need to have the Griid Connector running.
- If you are connecting with MIDI over Wi-Fi, you will need to use Network MIDI (Mac) or rtpMIDI (Windows).
- If you are connecting with MIDI over hardware, you will need an adaptor such as iConnect MIDI or iRig.
The advantage of using a Wi-Fi connection is that your iPad can move around and you can control Ableton Live from a distance. The advantage of using a hardware cable connection is that you avoid any possible issues with Wi-Fi interference.
Follow this video for instructions on how to setup Griid on OS X.
The Griid user manual has very detailed step-by-step instructions.