From Tom Bugs Sent Mon, Jun 11th 2018, 14:48
From Tom Bugs Sent Mon, Jun 11th 2018, 14:48
Always worth pointing out the Rane 101 App Note for cabling: http://www.rane.com/note110.html Lacking knowledge of where you are // what mains plug (is it earthed). What PSUs do the synths have? Establishing a solid 0V link between synths. And, yes, powering the soundcard from mains not USB/Firewire. Tom On 11/06/2018 14:39, Mike SynMike wrote: > A ground loop buzz is most often this is solved by plugging all devices (including the computer) into one power source. If that doesn't work, a Direct Box can often fix it. > > But given that your buzz stays on a specific input channel even when you swap the instruments around, I’m guessing it is a cable problem. Try a different audio cable on input 3. Are you sure you are using the same power cables as before the move? I once found that I had a power cable that was wired wrong from the factory. > > Mike. > > >> On Jun 11, 2018, at 6:13 AM, Sxnths <xxxxxx@xxxxx.xxx> wrote: >> >> Hello, >> >> I moved temporarily my studio to my gf apartment and I can't tell if she worked some black magic or I am being stupid.. I am faced with a rather simple ground loop issue that I can't solve. It seems to be between a Macbeth M5 and an Andromeda A6. They both go into a RME Babyface. I see the hum showing up on the input(s) mixer (even when the speakers are off or unplugged). >> >> One configuration causing the buzz is having the macbeth on input 3 (simple 1/4") and the Andromeda on inputs 1/2 in stereo (those are balanced XLR inputs but I believe the Andromeda main outputs are unbalanced ... not sure if I do something wrong here already). The buzz occurs as soon as the andromeda is plugged in and the power cable connected (it doesn't have to be on). The buzz is coming on the input 3 (the macbeth). >> >> I tried to switched and have the macbeth on the balanced inputs and sure enough ... buzz occurring on input 3 again (the andromeda's input this time). >> >> I tried moving plugs around, connecting to other outlets, close by, far, etc etc. With no luck. >> >> I guess I have multiple questions at this point: >> - am I doing something wrong with the balanced cable? Does it needs to have a special wiring to go from balanced to unbalanced? >> - can there be some missing isolation or connection inside the synthesizers causing the buzz? Any way to test for that? >> - is there any device that can help with this? Can the power strips be a culprit? >> >> Thank you in advance for the help >> >> > -- BugBrand LTD UK company No. 07199808 VAT No. GB 988 2629 57 1 Ninetree Hill BRISTOL BS1 3SB United Kingdom www.bugbrand.co.uk --- This email has been checked for viruses by AVG. https://www.avg.com