Originally posted by author:

olaf32

Now that the original Mafia is back on Steam, here's a guide that will show you how to restore the fantastic original soundtrack.
Restoring the music

1. First, download Mafia and go to its root directory. In my case it's J:\SteamLibrary\steamapps\common\Mafia\

2. Next, download this package: https://drive.google.com/file/d/134mDqgwWtEsV3haNXuKf3BNT-3onwRpq/view?usp=sharing and extract it.

3. Open the extracted folder (Called 'MUSIC') and copy it over to 'sounds' folder which you can find in the Mafia Steam directory, for ex. J:\SteamLibrary\steamapps\common\Mafia\Mafia\sounds

4. Winndows will ask if you want to overwrite the old files, click 'Yes'.