174 points

Inaccurate meme - the white and red RCAs in composite typically don’t actually carry the left and right channels - usually, the white one is L+R, meaning both the left and right channels combined into one, and the red one is L-R, the difference between the right and left channels.

This is done so that a mono television, which will only have a yellow and white port, will still be able to hear both audio channels, as opposed to having to completely miss out on one of them

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38 points

Wow, Til I guess. Never ever thought that this is what actually it is for.

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21 points

That makes so much sense! I never understood it, and it became irrelevant before I worked it out.

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9 points

It’s so funny, I had the same reaction! Never quite understood it, just switched plugs until it worked. Then it got phased out and… decades later a meme brings light to my confusing childhood!

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12 points

Do you have a source for this? AFAICT this is untrue. Mono audio using just the white connector exists, but this depends on configuration and does not make the red connector a difference signal.

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10 points

I swear that I’ve seen it mentioned somewhere, but you are entirely right that I can’t find a source. Maybe it was some weird device I used a long time ago? Regardless, sorry for not doing my research before posting

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1 point

The signal in fm radio works like you described. Poor fm, declassified to just some weird device :(

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11 points

The video cable does a similar trick with how it supports color. This is why S-Video was superior to composite video until component came along. S-Video split the intensity and color into two signals and then component split the color further into a blue difference and a red difference. If you only wanted black and white, you didn’t need to use the color signals and the image would degrade to a monochrome representation.

The composite video, with only one video signal wire, was similar to what was received over the antenna, with the broadcast signal separated from the carrier signal and the audio sub bands removed. It was the video signal with the color signal still combined. The progression from Antenna -> Composite -> S-Video -> Component -> DVI-I -> DVI-D -> HDMI -> Display Port has been an interesting one. The changes in the digital realm have been less about the image quality, the digital signal can either be read or not, and more about the bandwidth and how much data can be sent, aka resolution and framerate. Those first four transitions in particular had significant impact on the image quality.

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4 points

This must be BS or a regional thing. All the RCA ports I’ve seen in North America are labeled L and R, not L+R and L-R.

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2 points

I use those on my speakers and I can flip left/right stereo if I flip the cables. I think that confirms that they don’t have both in one I think.

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2 points

It’s possible that it might only be a thing in PAL regions - I’d try, but I don’t have anything that uses composite to try now.

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2 points

I can confirm that everything that uses component and L/R that I have used in my life (born in 2001 in the Netherlands, so PAL) has separate L and R channels. I have confirmed this with my multimeter before.

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4 points

Oh, they did the same with stereo radio.

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2 points

I appreciate you starting this comment with ‘Inaccurate meme’. I think it should become a thing. Really helps me know to buckle in for something good

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85 points

Transcription:
Audio Right + Composite Video
Composite Video
Audio Right + Audio Left

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24 points

Thank you. Guess I must be a HDMI kid, who would have known.

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19 points

Audio Right + Composite Video

Is that the guy that cut his ear off?

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17 points

Vincent van Gogh, yes.

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5 points

Only the tip.

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3 points

Mike Tyson and Evander Holyfield comes to mind…

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1 point

They why did Radio Shack sell me a Y adapter to combine left and right?

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2 points

It’s so you can use stereo speakers with a mono source

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45 points

Pretty sure Van Gogh wasn’t deaf in that ear though.

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19 points

Things probably sounded weird there though. Lots of whooshing.

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9 points

Definitely. A piercing in my conch, was enough to give me some mildly annoying tinnitus for years.

Can’t imagine if my ear was just…gone.

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7 points

Weird that your vagina would do that

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1 point

He only took off a small portion of his ear.

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His GF could whisper in his ear all the way from across town.

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1 point

I think it might be the opposite, our ears direct and funnel sound

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1 point

I’m viewing this through the Liftoff app and your username has big block letters and a blue circle for the O but looks normal when viewed from other apps. Is that some customization you can do that only shows up if an app supports it?

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It’s Unicode and emojis in the display name. Some instances don’t have a display name, just the username.

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2 points

I think in your user profile settings, you can set a separate display name. Then it’s up to the client on how to render your username/displayname.

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2 points

I think y’all are nitpicking this joke too hard

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38 points

gamerz like me:

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37 points

laughs in european

I present to you: the Scart.

Our gaming consoles came with it.

We were clueless the first time we hooked up our N64 at gran-gran, since the old TV did not have a Scart connector, but we figured out that the Scart’s colored cables go in there.

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12 points

Scart was amazing. RGB, composite, component, audio. All in one cable. Granted that cable and connector were enormous, but one cable nonetheless.

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14 points

SCART was terrible.

Theoretically it had all that in one cable, in practice it never did. You’d usually have 3-4 SCART ports on a TV, but not all ports accepted our output the same signals. There was no way to tell from the outside what the output or input from a SCART port so you either had to try different port combinations or look it up in the manual (if you had one). Most TV’s had one port that accepted s-video, on that accepted RGB and they usually accepted composite on all ports.

Worse, not all cables had all 21 connections. If you were lucky you could tell because not all pins on the connector would be there (but this wasn’t necessary the case).

Usually there was also one port on a TV that output the video from the tuner. This was used for analog pay TV decoders. You would hook it up to that SCART port and it would get the scrambled video from the TV and return the descrambled video over the same port.

Also, due to the size and design of the connector it was almost impossible to insert it blindly. Inserting one into the back of one of those enormous CRT television was always a challenge.

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2 points

Oh yeah the shielding was a nightmare to align with the socket correctly

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