the ‘visual response’ component of https://patchstorage.com/fluidtransitions-usb-version/ (very much optional)
The main component https://patchstorage.com/fluidtransitions-main-loopbackusb/ will work perfectly well with (part of) a keyboard with no need for these pipelines.

This module sends events back to a midi-controller (Novation LCXL) to switch off previous LEDs and light the currently selected setting.

Adaptable to any continuous range of note buttons