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UR22 Low Hum

Posted: Wed Jan 30, 2013 12:56 am
by Digitalsword
I just received my new UR22 and every audio recording has a low hum throughout the recording.
Listen to attached sample.

My Focusrite and Audio Kontrol do not have this hum.
All settings, ports, DAW software are identical.
This is attached to a USB 2.0 port , not USB 3.0 port.

Any suggestions?

Microphone: AKG Perception 220 Professional Microphone (less than a year old) / Works with the other USB audio interfaces with no hum

Computer Specifications: 32 GB Ram, Windows 7 Ultimate, Intel i7-3820QM 2.7 GHZ, 4GB video Ram, 2 SSD hard drives

Re: UR22 Low Hum

Posted: Sun Feb 03, 2013 11:47 am
by Dj Moe$
Make sure mic wire is plug all the way in on both side, or try another wire. I get the same kind of sound with wire problems sometimes. If not Im not sure what it could be

Re: UR22 Low Hum

Posted: Sun Feb 03, 2013 1:59 pm
by Digitalsword
Confirmed cables are secured properly. Additionally, I have all new cables.
Lastly, I left all things the same and simply switched out the UR22 with my two other USB audio devices and only the UR22 had this problem.

Any other suggestions?

John

Re: UR22 Low Hum

Posted: Tue Feb 12, 2013 8:40 pm
by bashar
try a different USB cable!

Re: UR22 Low Hum

Posted: Wed Feb 13, 2013 12:33 am
by Digitalsword
I have a half dozen, excellent USB cables, plus the new one that came in the box.
Additionally, I exchanged the unit for another one, new cables and all...still have the hum.

Re: UR22 Low Hum

Posted: Wed Feb 13, 2013 12:36 am
by bashar
Sound like a ground problem between the speaker and the unit, balanced xlr cable? The power source for computer and the speaker is the same strip and grounded ?

Re: UR22 Low Hum

Posted: Wed Feb 13, 2013 12:40 am
by bashar
Make sure you are using balanced 1/4" cables, they look very similar to the non balanced cables

Re: UR22 Low Hum

Posted: Wed Feb 13, 2013 1:08 am
by Digitalsword
I am using Mogami Gold AES/EBU Interconnect Cable with Neutrik XLR Features...on't think its a cable issue.
I am using the same cables with the other USB audio devices and there is no hum with them.

Re: UR22 Low Hum

Posted: Wed Feb 13, 2013 1:17 am
by bashar
That fancy cable is made for digital aes signal,try a different regular old fashioned cable that is balanced

Re: UR22 Low Hum

Posted: Wed Feb 13, 2013 2:09 am
by Digitalsword
I have tried those too and no better. As I keep repeating, if I leave all things the same (XLR cable (both kinds), USB, microphone) and replace the UR22 with the other USB Audio Devices, no hum. It's the box.

Re: UR22 Low Hum

Posted: Wed Feb 13, 2013 2:16 am
by bashar
Try a different computer or laptop, maybe your dealer got a bad batch or your computer is acting up, is everything running of the same power strip with ground, just because your other interfaces are not playing the hum does not mean there is no ground problem, they could be better at hiding the problem, even worse!!!

Re: UR22 Low Hum

Posted: Wed Feb 13, 2013 2:39 am
by Digitalsword
I have 3 different laptops including PC and MAC. I also have two different places to plug in. I also have two different microphones. None of these changes made any difference. I tried to do as much of this troubleshooting on my own before coming to the forums.

Re: UR22 Low Hum

Posted: Wed Feb 13, 2013 2:42 am
by bashar
I would not be surprised if your dealer got a faulty batch, note the serial number , sorry:((

Re: UR22 Low Hum

Posted: Wed Feb 13, 2013 8:24 am
by Digitalsword
thanks!

Re: UR22 Low Hum

Posted: Wed Feb 13, 2013 8:33 am
by BriHar
On the rear of the unit there is a screw just above the USB connector. Connect a wire to ground from this point.

Re: UR22 Low Hum

Posted: Fri Mar 29, 2013 3:42 pm
by paulskiogorki
Digitalsword, I am wondering how you have made out solving this hum problem, since I am getting it too.

To be honest it's really hard to tell if it's electrical hum or whatever, or just some noise coming through the mic stand.

Anyway, were you able to solve the problem?

Thanks

Paul

Re: UR22 Low Hum

Posted: Fri Mar 29, 2013 4:30 pm
by Digitalsword
I solved the problem by returning the product.
I have several brands of these USB audio interfaces, and only this one had the hum.

You can try using the ground terminal on the back to resolve the hum.

Re: UR22 Low Hum

Posted: Sun Mar 31, 2013 2:26 pm
by paulskiogorki
Thanks, I will try the grounding.

I actually packed up my UR22, mic, cable and laptop and went back to the store and there was no issue. When I got back home the problem was right back again. Grrr. I was even getting it when running in battery power only from the laptop. Do you suppose grounding will make any difference?

Re: UR22 Low Hum

Posted: Sun Mar 31, 2013 2:33 pm
by Digitalsword
I think it would be a great idea to try and let every know in the forum.

Re: UR22 Low Hum

Posted: Thu Apr 04, 2013 7:40 pm
by Anikee
Hi everyone!

Did you ever solve the hum-problem by grounding the ur22 @paulskiogorki?

I seem to be having the same issue here... Just got my ur22 out of the box a couple of hours ago. Everything works fine except that when I turn on 48v phantom power to juice up my Studio Projects B3 condenser mike that low hum appears.

I haven't had the time to try different cables, microphones or anything yet but I did try to ground my ur22 the way that is described earlier in this thread, but it did not work for me...

My Specs: iMac 27" i5 mid 2010, the rest is mentioned in the text above.

Re: UR22 Low Hum

Posted: Thu Apr 04, 2013 8:56 pm
by paulskiogorki
I'm afraid the grounding didn't work for me either.

As much as I liked the unit, and especially the pre-amps, I ended up exchanging it for something else because my retailer is out of stock and back ordered on UR22's.

The Akai EIE Pro I got has no buzzing whatsoever. The pre's are not as sweet sounding but they are still good, and for the extra $100 I got a USB hub and more inputs.

Re: UR22 Low Hum

Posted: Thu Apr 04, 2013 10:59 pm
by nick_cameron
Same thing here, I can't help but think it's just a poor product I'm afraid. The amount of noise is awful.

Re: UR22 Low Hum

Posted: Fri Apr 05, 2013 7:20 am
by BriHar
Sometimes it's not so much a matter of grounding but rather of potential equalization - i.e. elimination of potential differences between devices. So rather than, or perhaps in addition to grounding the unit, make a connection between the device and the chassis of the PC or Laptop.

Re: UR22 Low Hum

Posted: Fri Apr 05, 2013 3:10 pm
by nick_cameron
I have an very inexpensive ART pre amp and I plugged the mic into that, then went into the line in and no hum at all.
Just annoys me that several people have this problem, it should never arise in the first place, other modules don't do it.

They really bigged up the pre amps on this unit but what's the point if you can't apply a decent amount of gain? I tried recording a finger picked guitar part and it was unusable.

Re: UR22 Low Hum

Posted: Fri Apr 05, 2013 5:56 pm
by Anikee
I think I will try to make a connection between my iMacs chassi and the ur22 before I send it back to the retailer... I really like the little box otherwise... :roll: