Add or Change Music to a Main Menu

 First, If you do not have sound, you must download the sound (Download Sound) and follow the steps :

• Place the music you want to use in the "\sound" folder at your mugen folder.

• Go to "\data" folder at your mugen folder. Then,open "system.def" using notepad.
  
• Find "[Music]" (Press "ctrl + f" to facilitate the search) .  Then, find this :
  title.bgm = sound\yourmusic.mp3 ;You can change background music.
  title.bgm.volume = 100 ;volume scaling factor in percent. 100 is default.
  title.bgm.loop = 1   ;"1" for "true" and "0" for "false".
• Change "yourmusic.mp3" with the title song accompanied format that you add into the folder "sound".
• Save file, then close "system.def".