/vr/ - Retro Games

>>3184705
Interference between the video signals/5v line and the two audio lines. If the cables are thin and not shielded from each other, the video lines will be outputting EMI which get's picked up by the audio lines and shows up as buzzing and noise. Brighter/White screens amplify this effect as it requires R, G, and B to be at full intensity, and as such more voltage going across the lines. This -shouldn't- be as much of a problem with YPbPr as the only line that should be heavily changing based on screen brightness is Y(Luma), but the way these cables look to be built, you're still carrying RGB out of the system a bit before transcoding and that portion of the cable looks incredibly thin and unshielded.

This is an issue with SCART cables especially, since you have any where from ~10 to a full set of 20/21 wires running through a single cable and shitting out god knows what sort of noise and is a big reason why cheap ass chinese cables are frowned upon and why retro_console_accessories gets so much business from PVM owners.
You either need to shield the fuck out of your cables or separate the audio from the video signals as soon as possible. Whether you do the latter via split cabling or "other means" is up to you.

This is the monster I put together to deal with the terribly heavy buzzing my Saturn cables had.
Frankensteined the shitty SCART cable, faulty VGA->5BNC cable that came along with the Megaview, and a set of RCA cables that had went with a broken tapedeck.