USB Noise

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Hi all,

I have a Behringer UMC202HD USB Audio Interface and a Pioneer DDJ 400 DJ Controller(With built in audio interface)

With either the DDJ or the UMC plugged in I get no annoying "USB Noise" but plug them both in and its there.

Anyone know how I may go about resolving this ?

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Are you using a USB hub? If so, is it powered?

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Haven't tried it myself, but these are supposed to help: Behringer MicroHD HD400 Ultra-Compact 2 ... Destroyer

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thecontrolcentre wrote: Sun Nov 17, 2019 5:30 pm Are you using a USB hub? If so, is it powered?
Have tried both, plugged into a hub and direct to rear ports on motherboard and various combos thereof, same issue.

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Update:

The noise is now gone with the DDJ on the powered USB hub and the UMC on a motherboard USB connector.

I do not know why this solves the problem, will have to look deeper some other time for for now.. no noise, yay.

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Probably ground loops: alternative electrical paths through the shield / ground
Glad you fixed it!
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mfny wrote: Sun Nov 17, 2019 10:00 pm Update:

The noise is now gone with the DDJ on the powered USB hub and the UMC on a motherboard USB connector.

I do not know why this solves the problem, will have to look deeper some other time for for now.. no noise, yay.
Like Bert said, probably a ground loop. Great that it's fixed :)

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Orion Platinum, Muzys 2

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Do either or both of the devices use USB cables with a ferrite choke?

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