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BombKit

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Hey, guys! So, several months ago, my PC fell off my desk (thanks to my cat.) and I thought it had messed up some of my wires to my condenser microphone (Which feeds from my mic to my phantom power into my USB), I got new wires but they all still had this annoying buzzing sound. Finally, I gave up on the mic and bought a new one, and instead of going through my phantom power interface, like with the old one, I bought an external sound card, plugged it in (as I didn't know if the phantom power was part of the problem either) and plugged my new mic into it. Same buzzing sound came out from the mic, but not only that, with the external sound card, I had to also plug in my headphones, whenever I did that, the same noise comes through. I have tried every single USb port and they all give off feedback. My mouse and keyboard and controllers work just fine on my PC but any USB sound device either gives off or receives some kind of feed back. I uploaded an MP4 file on YouTube that contains the sound. Thanks for your input and time!
 

managed

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Allan
You could try fitting a Usb expansion card.
 

BombKit

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Thanks for the response! I could but is that the only way to fix what's going on? It isn't just one USB that's the problem , but all of them. Which is about 8 in total. I'm just worried I'll replace it but then have the same problem.
 

managed

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I was thinking the cause might be ripple on the power for the Usb ports, that could cause buzzing.
To be honest though that's just a guess. There are some very cheap Usb cards around so I thought it was worth mentioning.

Other possible causes are ripple on the power to the microphone and an earth/ground loop caused by more than one path to earth in the set up.

I think the best way to troubleshoot would be to try your mic and phantom supply on a different computer to see if it works ok then.
 
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