I am using either a Sennheiser headset that plugs in using the pink and green plugs to the soundcard or a Raptor HD40 headset which connects via a USB 2.0 port. In either case I get a low frequency hum when I record to Audacity and I get this on a Lenovo X300 laptop running Windows 7 and Audacity 2.0.2, another Alienware 17 laptop running Windows 8.1 and a desk PC running Windows 7 both with the same version of Audacity. The two laptops are in the garage and the desk PC s in the house. The mains power to the garage comes from the house.
I have attached a small sample file of a recording of the hum and if there is anyway to get rid of it I would be grateful to hear how to do it/what's causing it.
Hum Removal
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This forum is for Audacity on Windows.
Please state which version of Windows you are using,
and the exact three-section version number of Audacity from "Help menu > About Audacity".
Audacity 1.2.x and 1.3.x are obsolete and no longer supported. If you still have those versions, please upgrade at https://www.audacityteam.org/download/.
The old forums for those versions are now closed, but you can still read the archives of the 1.2.x and 1.3.x forums.
This forum is for Audacity on Windows.Please state which version of Windows you are using,
and the exact three-section version number of Audacity from "Help menu > About Audacity".
Audacity 1.2.x and 1.3.x are obsolete and no longer supported. If you still have those versions, please upgrade at https://www.audacityteam.org/download/.
The old forums for those versions are now closed, but you can still read the archives of the 1.2.x and 1.3.x forums.
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brianejsmith
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Hum Removal
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- Hum.mp3
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Re: Hum Removal
Didn't know that gaming headset from Corsair, so I turned to auntie google...
This is the first hit:
http://www.tomshardware.co.uk/answers/i ... -hs40.html
Maybe it's like your problem?
This is the first hit:
http://www.tomshardware.co.uk/answers/i ... -hs40.html
Maybe it's like your problem?
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brianejsmith
- Posts: 86
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Re: Hum Removal
My Corsair headset is a USB connected device and as I said in my post, I get exactly the same outcome when using the Sennheiser headset which connects via the microphone/headphone sockets (the pink and green connectors) so I don't think it's relevant, sorry.
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kozikowski
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Re: Hum Removal
It is like walking into a blind alley, isn't it?
Can you run one of the laptops on batteries and try it again? Still on batteries try it out in the street or meadow.
I have a Giant Hummy Monster that lived in the attic. He makes recording in one of the bedrooms impossible because of excessive hum pickup—even on batteries. All equipment works famously outside of that room. It may also have to do with the high tension wires that go over the house (attached).
Traditionally it's difficult to filter that sound in post production because it involves a number of frequencies. Hum isn't one thing.
It's possible you have wiring errors in your house. I've had several in mine. You can buy a wall power tester. This is what the US one looks like. It can test for reversed wires and "Hot" where "Neutral" should be.
Outlet Tester (GRT-3500) at Aubuchon Hardware
http://www.hardwarestore.com/receptacle ... 81667.aspx
Koz
Can you run one of the laptops on batteries and try it again? Still on batteries try it out in the street or meadow.
I have a Giant Hummy Monster that lived in the attic. He makes recording in one of the bedrooms impossible because of excessive hum pickup—even on batteries. All equipment works famously outside of that room. It may also have to do with the high tension wires that go over the house (attached).
Traditionally it's difficult to filter that sound in post production because it involves a number of frequencies. Hum isn't one thing.
It's possible you have wiring errors in your house. I've had several in mine. You can buy a wall power tester. This is what the US one looks like. It can test for reversed wires and "Hot" where "Neutral" should be.
Outlet Tester (GRT-3500) at Aubuchon Hardware
http://www.hardwarestore.com/receptacle ... 81667.aspx
Koz
- Attachments
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- Screen Shot 2015-07-28 at 23.17.17.png (37.88 KiB) Viewed 537 times
Re: Hum Removal
Have you read the solution?brianejsmith wrote:My Corsair headset is a USB connected device and as I said in my post, I get exactly the same outcome when using the Sennheiser headset which connects via the microphone/headphone sockets (the pink and green connectors) so I don't think it's relevant, sorry.
If that is the solution, the outcome could be the same with the Sennheiser...
You either have a hardware ground loop, which is possible, of course, or you have a slight hum, which is amplified by the Windows setting.
But a hardware ground loop seems somewhat less plausible, since the hum is present on three different computers, with two kinds of interfaces.
But then, like The Koz said, It is like walking into a blind alley, isn't it?
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brianejsmith
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Re: Hum Removal
I was hoping that someone could analyse the hum recording and tell how it was being generated,
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kozikowski
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Re: Hum Removal
You live in a 50 Hz country and it's being generated the the local power company.
Did you try the batteries?
Koz
Did you try the batteries?
Koz
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brianejsmith
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Re: Hum Removal
Oh, OK, I hadn't picked up on that. I'll give it a go on both the laptops running on batteries. Thanks for pointing it out again. Sorry I didn't pick it up first time you mentioned it.