Okay, this will become VERY usefull to many RPG XP/VX makers. A music time modification script.
Basically, it could have many uses, but basically, it allows you to stop music, or continue it from a specific point.
Example uses: could be used in dynamic battles, where, after a certain amount of HP an EXACT COPY of the song (slightly changed) will start to play from THE EXACT POINT where the other song left off. This could make it to where the music slowly changes to a heroic tune when the enemy is about to die, and an enemy-istic tune when your about to die.
Could also be used in songs with intros, so the instead of playing the intro, it would loop from BEFORE the intro.
Where I looked:
Oh god...umm...
Here
Creation asylum
Japanese sites
French sites
hbgames.org
On and on and on.
Well, the closest thing I've found was the SAudio module by BEHEMOTH, but it does require minor scripting knowledge to use. Unfortunately, it only recognizes MIDI files, which is why it is not so useful :/
In any case, it is a fairly difficult task, so I think that might be the closest you will get. Blizzard even included this kind of script in his list of 'Impossible Scripts'. That being said, if you were willing to exclusively use MIDIs, then you might be able to recruit a scripter to work with that SAudio module to make the scripts you are asking for.
I attached BEHEMOTH's modules
The reason Blizzard included it is because the API for the built-in Audio module does not offer the functionality needed.
You will have to use a dll file in addition to a script, which will be a complete rewrite of the Audio module.