Check whether Steel Century Groove supports custom music files or mods
Locate the game’s install folder
Look for a music, audio, or mods directory
Back up the original files before making changes
Convert your music to the required format if needed
Match the game’s expected file names and folder structure
Replace or add the music files in the correct directory
Save the changes
Launch the game and test the music
If the game uses a mod loader, install and enable the mod first
If the game uses playlists or config files, update them to point to your tracks
Verify volume levels and looping behavior in game
Restore the backup if the music does not work