Thanks twinsen! It was a minor issue, I've got thousands of hours in the game and I usually have my own music or a video playing on the second screen which is why I have the music off, but I had to hear the intro jingle especially during periods of many restarts (ie changing mods or startup settings...

Minor issue - I have Linux, probably impacts other operating systems. My music is is completely off (0%) but when launching the game it plays the "Factorio intro jingle" music. Through a bit of trial and error I figured out that this is controlled by "GUI effects" now. It appears...