new logo JPEG.jpg   When connected to Logic Pro via USB with the XR18/X18 you can send MIDI data from Logic to control parameters of the mixer in accordance to the MIDI implementation.   This is a handy feature if you are playing live to backing tracks you can use MIDI messages from Logic to keep your performance dynamic without needing to be hands on with the App. In this knowledge base article we will look specifically at using Program Change messages from Logic to automatically load snapshots. First we will show the settings required on the X Air Mixer.    Firstly in the SETUP screen under the Audio/MIDI tab make sure that USB RX is enabled as shown below: