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 ...

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An optical audio port, also known as a TOSLINK (Toshiba Link) port, is a type of digital audio connection that uses light to transmit audio signals between devices. This port is commonly found on ...