There’s an improvement package for the payware Emb-110 over at flightsim.to that aliases the King Air sound pack. You could probably download that and see how that author did it. But the issue with that is many of the sound events don’t work right when you alias them to a different type. With the Emb-110 aliased to the KA, you get “Autopilot Activated” the instant you turn on the battery, even though the AP is still off.
So what line would I use if I wanted to use the default Asobo a320neo sound to replace the FBW sound? I tried messing around with some of the lines but haven’t gotten it to work.