OK, I guess we can bring the Jingles back. We'll have a single option to toggle them on or off, and they'll be per-pack customisable, as before.
Meanwhile, we could also play music in the Main Menu. This would of course also be optional, either via the same option as Jingles (which would then become a catch-all to mute all menu sound) or via its own dedicated option.
Here's what I'm going to aim for:
Main Menu: plays music; either default SLX music, or music from the level pack directory, which will play on repeat until gameplay begins.
Preview Screen: does nothing; if music is already playing from the Main Menu, then it continues to play over the Preview screen. Or, if Menu sound/music has stopped for any reason, the Preview screen is silent.
Postview Screen: plays jingles for success or failure; again, the jingle sound will continue to play over the next Preview screen, but otherwise the Preview is silent.
Thoughts?