Master reference scale setup, you can point to it anywhere in project with either Note Harmonize device or Pitch Quantize module with sidechain note input from this Master device.
Additionally, you can use note input from track to shift root key of the scale, or shift root manually with Key offset remote control. Also you can use track note input as Global transpose modulation, which can be tapped into in Receiver preset (you have to point to device called Global transpose in Pre-FX chain of this Grid). And finally you can also set scale via key input as sustained chord, but keep in mind that all options that use keytrack can be used together and affect output.
Added option to punch in scale from input chord by x.iso