NBA Hangtime is a 2-on-2 arcade basketball action game following in the footsteps of NBA Jam. All NBA teams, each featuring 4 players to choose from, are included along with fast paced, over-the-top basketball, disregarding the normal rules of the game but including fouls and out of bounds. You can also create your own player, with a collection of body parts and clothing to choose from.
When the game is running, hit F2 to get to the internal service menu. Hit F2 again to "close" the service switch so that you won't get stuck in the menu. Now, navigate to the "Volume Adjust" option (following the directions provided) and adjust the volume. It's best to keep the volume no more than 80-90% filled as it might cause your sound to be overdriven and crackle. When adjusted, simply exit the menu.