Here you claimed in August that the new power supply solved the issue:

https://www.forum.rme-audio.de/viewtopic.php?id=25839

If not, why opening a new thread now?

Understood.  Happy to move it and close this one?

I'm not sure many would class Yamaha HS5's as too sensitive in general but I mostly keep RME Total mix at 50-60% main out volume.
I too have my Yamaha levels right down.  So in fact only when I push total mix to 100%, thats when I  begin pushing the HS5's.  And only for "loudish" referencing.  I do not mix at those levels and usually very low levels anyway.

So that "noise" remains even when Yamaha's are set at about about 3rd of there Max.   Also no difference to the interference no matter what output setting on the card.  -10db, +4db or high gain or indeed total mix volume muted.  It remains. 

I've also just discovered that if I disconnect Audio Monitors from RME outs, the noise disappears in the phones out so I'm getting somewhere now.  I'm just not sure if I get the balanced RME BO9632- XLRMKH which is only a few inches in lenght before it connects to my normal balanced cables would solve it.

Also wonder can you confirm the BabyFace RME BF-BOXLRMKH breakout XLR cable is compatible with HDSP9632?
Its slightly cheaper then RME BO9632- XLRMKH

Many thanks and apologies for splitting threads.  I will take note in future.

Thanks Vin but might you have some advice on how I do that?

Is it buying one of those Groundloop adapters that I plug into wall sockets and then plug my extension adapter (for all my gear) into that?  I have never dealt with these issues and am out of my depht.  I fear having to open up a wall sockets or something.

And just to be ultra clear:  The noise can sometimes disappear for a little while depending on computer activity.  Example I here waves of interference when booting up from splash screen to desktop.  But if I don't get to work and leave it sitting there I can hear it calming down as the computer is not being taxed in anyway.  I had thought groundloops where constant interference no matter what the computer was doing internally at least.  ?

Hmmm not sure but the wall sockets are UK/Ireland

And my RME HDSP (PCI) computer and Yamaha HS5 monitors are all plugged into the same extension plug which goes into the wall socket.  (Note I have tried putting them on separate sockets completely)

For audio, I'm going from RME RCA into TRS Monitors but have also tried RME RCA into TRS adapter into Balanced XLR monitors.

I hope I covered all there but please forgive my ignorance to your suggestions asI'm not sure I follow what you mean.  After googling "ground connection" I realize I know nothing about electrics.  Many thanks though.

That usually does not work as desired. The low level unbalanced signal is then travelling all the way through earth connections over the power sockets, in a totally different way than the 'phase' wire within the RCA connection.

IMHO here the balanced connection will solve the problem, even without lifting pin 1.

Thanks MC.  Do you know if RME BF-BOXLRMKH breakout XLR cable is compatible with HDSP9632?

(They look identical)

I think I have to try it now.  Will advise when I know for future interests.

Thanks again

Hi there,

Did you get a solution to this?

I m asking bc i am working around a similar thing with my AEB8/O

thank you, that s great

Pin 1 only connects to the shielding of the cable, there is no signal on that one. You can disconnect the solder on one side of the cable (usually the speakers' side) and thus break the loop that causes computer noise to travel along the shielding of all cables (XLR, USB, HDMI/DP).

If there is a strong radio-frequency signal close to your cables then the shielding might be weaker against it, but not necessarily. You need to try it yourself.

There are also ready-made adapters available with a switch to disconnect pin 1. But I find them too expensive for what they do and it's another pair of connections in the signal path.

Thanks Timur.
Detaching pin 1 from XLR cable solves whining CPU noise issue.

Will be great if someone could make complete sticky thread step by step guide and cover all solutions and workarounds.