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I'm trying to add a video player to an elderly TV. I have OSMC working well with HDMI, but I struggled to get it to work on Composite output. It's Raspberry Pi 3 B+ v1.2. Having been through the numerous posts, suggesting modifications to the config.txt, I decided that the audio buzz I could hear on the right channel was more than just noise, and swapped the Audio Right for the Video. Hey presto. Clear sound and Picture. I have subsequently tried several 3.5mm / RCA leads. If swap red / yellow, they all work. One of them even has the yellow labelled as "Comp Vid", but it only works if I connect the "Audio R" intot he video.

So, the question is: is the Raspberry Pi atypical or unusual? Is it simply that there is no particular standard and coincidence that my three cables are all the same (inappropriate) configuration?

Thanks.

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There are at least 5 different combinations of TRRS cable that are wired differently. You need to make sure you get the correct one.

https://www.raspberrypi-spy.co.uk/2014/07/raspberry-pi-model-b-3-5mm-audiovideo-jack/

Best option is to buy a cable from a Pi supplier that stated Raspberry Pi compatible.

How to test a cable:

https://www.youtube.com/watch?v=UEWs_bxDWic

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    I was afraid you'd say that! I've been working in Audio / Video equipment for about 25 years and I have NEVER seen a cable were white/red is NOT audio left/right, nor a cable where "other" is not video. The confusion is with TRRS. There doesn't seem to be a standard for that end. – KDM Dec 20 '19 at 20:27

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