To get the text label from a current source you need to use a little Lua. Helm can return the entire list of router names using the InputNames property of the router. If we split that into a table, we can then look up the source number to convert it to a name....
There are times when it is useful to be able to display the source that is routed to a particular output, or even vary the settings of devices based on the current routing. To do this we use a special function in the Lua programming language that is built-in to Helm....
