this post was submitted on 05 Aug 2023
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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
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.
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.
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.
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.