It is an object of this invention to provide a game device capable of accurately synchronizing the display of pictures with sounds. A game device for displaying a sound source object, which is virtually considered to be a sound source, on a screen and for producing a sound related to the sound source object from a built-in sound source is designed to obtain an audio parameter which defines a sound to be outputted from the sound source on the basis of a display parameter of an object, the display parameter determining the mode of displaying the sound source object as a picture, and to set the audio parameter at the sound source. As a result, the formation of pictures of the sound source object and the control of the sound source are performed in the same frame cycle for the display of pictures and, therefore, the display of pictures of the object is synchronized with the production of sounds.