Remember toslink has been on the market since 1983.
Fiber optic port on tv.
In all about 100 different types of fiber optic connectors have been introduced to the market.
There is good chance that a premium audio video receiver manufactured anytime in the last decade or two has a toslink port.
Go into the sound or speakers menu of the tv and select external speakers or audio system.
Try changing the channel on your tv to another digital broadcast.
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Better connectors lose very little light due to reflection or misalignment of the fibers.
The optical out port also called spdif or toslink is used to send digital audio from your television to a sound bar or stereo receiver.
Connect the other end to the optical in on your home theater or stereo system.
The audio data is converted from digitally encoded electrical pulses to light on the transmission end using an led light bulb.
Digital optical is a physical connection that uses fiber optics to transfer audio data from a compatible source device to a compatible playback device using a specially designed cable and connector.
An optical fiber connector terminates the end of an optical fiber and enables quicker connection and disconnection than splicing.
The connectors mechanically couple and align the cores of fibers so light can pass.
The optical cable works properly if you see a red light on both ends.