Mobile devices such as iPads are becoming so popular. The high definition screen is phenomenal with its distinct picture quality, but the sound is still an issue. Some of the mobile devices have only one speaker. Granted it is still good, but not what we would hope it would be. Most owners have to purchase an additional port to play sound through so they can get the quality sound they are looking for. Dolby Digital is upgrading their programs and soon to hit on the market is a new upgrade that will address this issue on some of the new mobile devices.