Hurdy Gurdy music app

Im trying to get an options menu working.
Iv got the basics working from this tutorial

But i would like to have the text labels update in the list to show whatch key/ transpose number etc

droneOnD = "Off"
local listItems = {"Gmajor",("Drone:"..droneOnD), "trumpet","","","" }
I set up my list like this
droneOnD is a

this always shows off on the label


Whats the call i need to get the text in the list up update?