Sound test
In the beginning of the game, let the credits roll by. When the person on the horse (blowing a bugle) is the only one visible, press Up, Up, Down, Down, Left, Right, Left, Right, B and A. The sound test screen will show up, and one of the boxes will be labeled "Operations." You can highlight the five little boxes here by moving the controller. Press A to begin the desired operation.
In the beginning of the game, let the credits roll by. When the person on the horse (blowing a bugle) is the only one visible, press Up, Up, Down, Down, Left, Right, Left, Right, B and A. The sound test screen will show up, and one of the boxes will be labeled "Operations." You can highlight the five little boxes here by moving the controller. Press A to begin the desired operation.