UpdateMusic

From OxeyeWiki

audio.updateMusic(musicFilename , volume)
Updates a music already playing started by audio.playMusic.
Parameter	Expected Type	Description
musicFilename	A string	The name of the music file, relative to the source folder. The name is case sensitive on Mac OS X.
volume	A number	Volume of the played music file, maximum is 1.
Returns
Returns true is the sound was updated, false if the sound is no longer playing or could not be found.

Example

   -- start of game
   audio.playMusic("intro.ogg")

   -- during loop:
   if not audio.updateMusic("intro.ogg", 0.5) then
     if not audio.updateMusic("level.ogg", 1) then
       audio.playMusic("level.ogg")
     end
   end