Things You'll Need
Instructions
Load your music files onto the PS3, or insert a USB hard drive or media card containing the music files. Press the "PlayStation" button on the controller, and press the right and left arrows to navigate to "Audio." Make sure the music files are accessible from this menu.
Open the game you wish to play, and begin playing.
Press the "Start" button on the PS3 controller to pause the game, and open the game's menu. Use the directional pad to navigate to the "Options" menu, and select "Audio" or "Music," depending on the game. Set the "Music" volume slider all the way to the left, to disable the in-game music.
Press the "PlayStation" button on the controller to return to the PS3 menu, and navigate to the "Audio" section of the menu. Use the directional arrows to highlight the music you wish to play, and press the "X" button to select it. The music should start playing.
Press the "PlayStation" button to return to the game and the "Start" button to exit the game's menu. The music will continue to play in games that support this feature. If the music stops playing when you return to the game, it does not support this feature.