AUdIoCoUrSeS
Joined: 31 Oct 2002
Posts: 2068
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I think you are going to have to replace each cable one at a time to see if you can eliminate the problem.
After that, if it still exists, you may have a fault with one of the boxes.
Have you tried your setup in a completely different room, or house, you are sure your electrical supply is clean?
But the fact that when you unplug one of the items you mention the problem goes does suggest it is a ground loop.
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It's all in the ears. - Learn the concepts not the software.
SAEOnLine is a way into the creative industries.
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Thu Nov 11, 2004 6:21 am |
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Peosea
Engineer
Joined: 20 Sep 2004
Posts: 41
Location: Ste-Foy, Quebec, Canada |
| hear a "hum" and "buzz" |
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One more cue here. What kind of light do you use? Tungsten or fluorescent? It does not happen often, but sometimes, fluorescent produces parasite that goes everywhere in the room. Generaly, it can affect the instrument i.e. a guitar (also, note that a REALLY cheap guitar combine with a really cheap cable can be use as a radio receiver. Weird but true.)
But sometimes, when you have really old cables; or cables in bad shapes, they are subject to those parasite. So you hear a "hum" and "buzz"
Also, check if your cables go near your AC power. Sometimes, it's just that. AC cables emit a weak but still here magnetic (or electro-magnetic) field, which can result in "hum" and "buzz".
Hope it helped
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Note: I'm french canadian. So sometimes, I can say things without any sense. If it happens, please tell me. I'll correct it
Am I creating music? Or is it music that creates me? |
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Thu Nov 11, 2004 9:30 am |
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Hm
Tape Op
Joined: 30 Oct 2004
Posts: 26
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| cables are new |
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The cables are new & i dont think if the problem from cables..But i will change the room & i will see what happen..But i can say one more think..In this room i did 3 years recording & mixing & never got the problem..Before i used Yamaha AW16 hard drive recorder & same korg keyboard with Event monitors & never happen this problem...Now im using computer audio
& Tascam Us-122 audio equipment & this problem start from that day...I mean i never had this problem before in this room....But i will try change the room ... |
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Thu Nov 11, 2004 12:25 pm |
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AUdIoCoUrSeS
Joined: 31 Oct 2002
Posts: 2068
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| Troubleshooting |
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You see this is why details are important, you didn't mention that.
If you had no problems before, then it ain't the room.
You will have to remove one box at a time until it goes, then when it does, try to work out why that box causes the problem.
It's a case of troubleshooting.
Cheers
_________________
It's all in the ears. - Learn the concepts not the software.
SAEOnLine is a way into the creative industries.
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Thu Nov 11, 2004 12:41 pm |
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Hm
Tape Op
Joined: 30 Oct 2004
Posts: 26
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| noise getting high |
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I want add some think i just saw that...Even when im moving the Computer mouse, the noise getting high.... |
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Thu Nov 11, 2004 1:00 pm |
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StudioWerks
Joined: 09 Nov 2004
Posts: 1
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| Ground Problem |
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I've seen a similar problem with my laptop (a Dell). When I try to hook it into my studio it injects noise into everything. I don't use my laptop for mixing so I haven't really debugged it, but I do know that if I disconnect the laptop power AC or DC, the buzz goes away. It seems like a noisy power supply is the issue.
I'm guessing that an isolation transformer in the audio path between the laptop and the rest of my studio might help, but I haven't tried it.
My 2 cents for what it's worth...
Steve |
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Fri Nov 12, 2004 9:59 pm |
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jeffdavies
Newbie
Joined: 27 Jan 2003
Posts: 3
Location: Seattle |
When units by different manufacturers are mixed, each manufacturer with it's own grounding rules, you can have this problem. Not all grounding can be done properly with just audio cables and ungrounded AC line cords. It's made worse when interfacing consumer gear like computers and televisions. In my home setup I found that connecting a single wire from the computer chassis to my amplifier clears up my hum. Try getting a single length of wire and connecting it to a screw on the chassis and touching it to various other chassis screws on different equipment. Since you say you have a TV connected, I would start with that or the computer and see when the hum gets better. You might need more than one piece of wire to properly ground your system. |
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Mon Nov 15, 2004 1:01 pm |
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vanhool
Assisstant
Joined: 24 Feb 2005
Posts: 32
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| Ground problem |
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I do a ground lift on computer output, workes for me.
In some cases equipment emits signal/electricity on ground line. Some more, some less. I had some problems with that also.
When power instalation is done unproperly (in any part of the electric circut)
the ground is connected to the negative line and you get a buzzzz.
You can also find a way to link the ground from your new equipmend with a simple wire with a metal grounded part of the building.
(I use the central heating system)
Another way is to get the catch only the buzz and do a phase shift. |
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Sun May 28, 2006 1:20 am |
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MTammariello
Newbie
Joined: 24 Aug 2007
Posts: 7
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Hey, I'm new with outboard gear and I have recently purchased some gear just to begin with. I remember reading on a post somewhere that a person ruined some of their gear because the screws used on the rack were not the correct ones and did not provide enough grounding for the gear. Personally I did not know this mattered very much. Can anyone explain this? Any help is much appreciated. |
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Fri Aug 24, 2007 7:07 am |
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