Custom song setup

1. Place one or more MP3 files in this folder. Any filename is supported.
2. Double-click UpdateSongList.cmd.
3. Wait until the updater reports success.
4. Restart World of Warcraft completely.
5. Open /bmh and select a song from the list.
6. Click "Test sound" to verify it.

Without a custom file, select the built-in WoW warning sound in the settings
panel or use /bbl standard.

Files ending in _25, _50, and _75 are generated volume variants. The updater
refreshes them automatically. Do not add those files manually.
