It was once the most high-tech and futuristic feature you could find: Transmit sound -- with light! Lasers! A cable not of copper, but glass! Except, it was almost never glass, and was usually ...

To get audio from your TV to your soundbar or receiver you either need an HDMI cable or an optical cable. Both can work, but for certain types of audio you'll need an HDMI cable. Fortunately, both ...