Logic Setup and Troubleshooting: Impact
If the controls/keys on your Impact iX, GX, LX or LX+ are behaving unusually or simply not working try this fix
You should now be able to control Logic's mixer from Mixer Mode, the instrument on the currently selected track in Instrument Mode and Smart Control parameters in Preset Mode.
If your Impact LX keyboard is
detected in Logic but control surface functions are not working, check
the USB Port Setup Mode:
If you continue to have trouble, please contact support.