+System: Every tick
-Audio: Preload (Your Sound)
But I wouldn't try preloading your music though. I tried that once and it took 15 min to load my game on a fast internet connection. lol
Only the most important sounds should be preloaded. These should be preloaded only once maybe in the start event of your first layout.
Never preload music, because it's streamed in Construct2. You should always make sure that your audio files are in the Music folder, and not in the Sounds folder.
If the late start is an issue with the music I can come up with a one trick.
I don't know if this works, but it should be possible to have a short loading screen/story intro or something similar.
Set mute "GameMusic", Play GameMusic, stop"GameMusic", Unmute "GameMusic".
And play it normally when the level starts.