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of all the technologies we have right now that suggest we really are living in

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the future perhaps nothing sounds more futuristic than the fact that we can

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transmit data with laser light indeed

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many of the highest capacity cables that form the backbone of the internet use

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fiber optics and fiber to the home connections that deliver very high

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speeds have become more popular in recent years but did you know that one

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optical technology that used to be pretty commonplace in home audio is now

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getting replaced by good old-fashioned copper i'm not talking about cds which

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you can learn more about up here i'm actually referring to the toshiba link

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or toslink connector if you're not sure what that is there's actually a good

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chance you have one on the back of your desktop pc it's a square-ish looking

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connector that's lit up with red light they were also extremely common not so

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long ago when dvd players ruled the world you see although toslink was

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originally developed in the 1980s to connect cd players to other audio

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equipment it made its way into dvd players and computers as an easy way to

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deliver digital audio over just one cable so if you had a 5.1 surround setup

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for example you could use a single toslink cable to send a digital signal

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to a receiver that would then decode it

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rather than one rca cable for every channel which would suck and it did and

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another cool thing about toslink was that because it used light it wouldn't

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suffer from interference from other nearby electronics so what we had was a

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convenient clean futuristic pathway for high resolution audio

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so why is it going away well one reason

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is that it's actually not very good at carrying signals over any kind of

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significant distance which is counterintuitive because those

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fiber optic cables on the ocean floor use light to transmit data and they work

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for huge amounts of information being sent thousands of miles away so what

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gives the answer is in how the cables are physically constructed unlike higher

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spec high bandwidth fiber optic cables optical toslink cables are often built

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with how you say cheap plastic as a transmission medium inside contributing

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to the light attenuating or losing its strength as it travels down the pipe

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this means that not only do toslink cables have a maximum length of around

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10 meters or 33 feet but also that they're bandwidth limited compared to

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other solutions the latest version of toslink has data rates up to 125

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megabits per second which is certainly fast enough for high-res audio and even

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theoretically for high def video at the same time but the release of HDMI in the

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early 2000s created a very sticky situation for toslink not only did HDMI

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offer a relatively easy one cable solution for both audio and video even

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the very earliest versions of HDMI were a lot faster than toslink meaning they

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were not only good for consumer applications but also professional

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settings where users needed to work with uncompressed video on audio despite the

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fact that HDMI just uses copper cables without any fancy optical data transfer

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their construction meant that they could carry faster signals over longer

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distances and tossling cables also had a bad habit of breaking if you bent them

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too much due to their more rigid cores something that HDMI cables could

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withstand a lot more easily so as time went on the industry concentrated on

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expanding the HDMI spec to support more and more audio standards such as

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lossless dts master audio dolby true hd

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and the newer dtsx and dolby atmos which you can learn a lot more about up here

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toslink on the other hand was more or less left to languish although

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it certainly would have been possible to update the spec and make it compatible

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with newer fancier formats no one ever really got around to it because HDMI

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largely made it irrelevant but that doesn't mean that toslink is totally

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useless today it still works well as a simple hookup for compressed digital

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audio like bog standard dolby digital or dts 5.1 and you'll still find it on many

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sound bars out there as an easy way to connect to a display even if there's no

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HDMI out available even some small devices use mini toslink which can be

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combined with a standard 3.5 millimeter jack in order to save space and if

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you're using a vintage audio receiver maybe that doesn't have HDMI so you got

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to get to your tv somehow so it's not quite dead yet okay just don't tell

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those corners from monty python in the holy grail a reference from before you

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were born probably speaking of death today's video is

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watching guys if you like this video give us a thumbs up give us a subscribe

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and be sure to hit us up in the comments section with your suggestion for topics

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that we should cover in the future