Audio Buzzing issue with Framemeister - HALP!

[Csauce]

So I've been recording a Sega Saturn game through my Framemeister's RGB port which is hooked up to an HDMI splitter that splits the connection to my TV and to my Game Capture HD 60. Recently I've been getting a constant high pitched buzzing noise throughout the recording (mostly notable in silent scenes). It didn't do that before.

You can hear the noise on the TV, but only if you turn the speaker volume way up, but in the recording software you can hear it at normal listening volume (so it got amplified by something). I've tested out my NES and Sega Saturn (2 different SCART cables), and I've replaced the SCART converter cable, yet the noise is still there. When I connect my PS3/PS4 into the Framemeister via the HDMI port, however, I DONT get any audio noise. Swapping HDMI cables and using different splitter ports didn't fix the problem either.

The only thing I can think of is that the RGB connection on my Framemeister got damaged somehow, which means I would have to buy ANOTHER Framemeister. Does anyone know what the problem might be and how to fix it so I don't have to replace my Framemeister (which might not even solve the issue)?

Thanks!

[Guspaz]

The HDMI input is carrying digital audio, while the RGB is analog audio. Perhaps there is a ground loop?

[Csauce]

How do you mean?

[Fudoh]

The only thing I can think of is that the RGB connection on my Framemeister got damaged somehow

audio for RGB can be fed two ways: through the RGB Mini Din adapter and through the RCA/Cinch ports on front. You can try the RCA ports to check if you get the same audio issue there. Also the Mini's A/D audio conversion isn't great, so you should make sure that the audio level isn't set higher than neccessary. You shouldn't set it higher than its default level and better even lower it from that. It's better to keep the A/D audio level low and increasing the level on your TV or your capture app instead.

[Csauce]

I tried the Saturn composite cables and there's no audio buzzing or hissing issue when I do that. It seems like it's either the SCART cables or the RGB input (or both?). I replaced the euroscart to xrgb-mini cable already (which didn't solve the problem), so basically A: the new cable is also bad, B: the Saturn and NES scart cables are bad or C: both the new cable AND the Saturn/NES scart cables are bad =/