MusicListWML
From The Battle for Wesnoth Wiki
the [music] tag
This tag is a subtag of [scenario] and [event] which is used to describe a music track to play. You can repeat this tag as many times as you like; if you set the append tag to yes they will form a playlist from which tracks will be selected at random.
Tags describe the music track:
- name specifies the music file, relative to '"music/"'. This is compulsory.
- append=yes specifies this is to be added to the current playlist. Without this, the current playlist is replaced by this track.
- play_once=yes immediately switch to playing this track, but then return to the play list, which is unchanged.
- immediate=yes immediately switch to playing this track. Without this, the song will play when the entire [event] is over or the current song ends. This exists to force music changes during dialog exchange or other [event] which take significant time.
- ms_before (optional) specifies how many milliseconds to delay before playing this track. Currently this does not apply when the scenario first starts, or with play_once or immediate.
- ms_after (optional) specifies how many milliseconds to delay after playing this track.