(CBS) - The PlayStation Vita launched with a warm reception from consumers. Sony's portable gaming device sold 321,400 units in its first two days in Japan, according to research firm Enterbrain.

That said, the background music pumped out by ... Step One: Turn on your PS Vita. Step Two: Tap Settings and then Start. Step Three: Scroll down to the Sound & Display option.

The PS Vita, first unveiled in Tokyo in January, is expected to go on sale in the United States and Europe in early 2012, but exact dates have yet to be revealed. Sony said it will launch 26 ...