PC Engine duo RGB audio hum/buzz

[gtsamour]

I tested a cable from www.retrogamingcables.co.uk yesterday. To my surbprise the buzzing is almost non existent.

With the volume at maximum and adventure island game at pause, there is only a slight background noise that doesn't classify as the regular hum/buzz thing of the rgb modded pcengines.

I opened the scart and din parts of the cable.... nothing special there. The cable shielding part goes to the sound ground and the pin ground on the composite ground pin of the scart connector. No other ground connections anywhere else in the scart connector (metal shell, RGB grounds etc).

The cable part doesn't look like the super high quality ones (individually shielded wires).... Its not thick and the wires inside it are not particularly thick either.

Maybe afterall it has to do with being of good quality and it being only 1,5m instead of the longer ones I have made myself and experimented on (3m) using high quality cable.

[edomatic]

Is there anyone here who has found a way of eliminating or reducing the high frequency whine emitted by the huc6280 chip?
I find that whine really annoying , if the volume is up during gameplay (and heck, it's always up! :-) )..then it is clearly noticable
I am using a decent cable ( RGB-Sync to scart) that does not produce to much hum/buzz but this high frequency whining is terrible

[edomatic]

Nobody?

[Keith Courage]

I'm not sure if others here know what sound you're talking about. including myself.

[gtsamour]

I think he's referring to the buzzing sound on RGB modded consoles...

[edomatic]

Well,specifically is was referring to the high frequency interference heard when playing games like bomberman '94, ninja spirit,son son 2 and many others, its like a whine or something
I tried hooking up (soldering) the audio cable seoerate to the video direc from din connector to my audio amp and it still there
I tried with a 31 band equalizer but have to really cut nearly all to get rid of it so that it ruins the audio
I think i read somewhere that its caused by thr huc6280 directly

[Keith Courage]

Well,specifically is was referring to the high frequency interference heard when playing games like bomberman '94, ninja spirit,son son 2 and many others, its like a whine or something
I tried hooking up (soldering) the audio cable seoerate to the video direc from din connector to my audio amp and it still there
I tried with a 31 band equalizer but have to really cut nearly all to get rid of it so that it ruins the audio
I think i read somewhere that its caused by thr huc6280 directly

What scart cable are you using?

[mario64]

Glad to hear I'm not the only one with this issue. I'm going to order a high quality coax cable from retro console accessories but it sounds like even that may not help? Is the consensus now this is a hardware issue?

[Keith Courage]

No, it's most likely the cable. What kind are you currently using?

Mickcris here in the forums sells good quality scart cables that work great. hardly any hum or buzz to be heard using them. http://www.pcenginefx.com/forums/index.php?topic=18845.0

[mario64]

No, it's most likely the cable. What kind are you currently using?

Mickcris here in the forums sells good quality scart cables that work great. hardly any hum or buzz to be heard using them. http://www.pcenginefx.com/forums/index.php?topic=18845.0

I've tried both retrogamingcables.uk and retro console accessories. Both have the issue. I'm looking into the shielded coax cable from retro console accessories next

[Gypsy]

I think he's referring to the buzzing sound on RGB modded consoles...

Probably. But PCE audio is noisy anyway, even on untouched systems. This has been my experience with multiple PCE systems anyway.