Tempest - How to play back and records chords 

Use Logic Pro X to record your keyboard midi performance. The midi performance can be quantized, nudged, moved, edited and played back later. The Tempest will receive and listen to this midi performance, and behave accordingly. When you are satisfied with your midi performance, the actual audio can be recorded directly from the outputs of the Tempest, to the input of your audio interface and Logic Pro X.