Buzzing from speakers when movement on screen

Hi there,
I've a bit of a bizarre issue, and I'm wondering if anyone has any suggestions...
I recently acquired a set of Mackie MR5 reference monitors, and am running them through a Tapco LINK.usb audio interface. They work great, with the exception that +anytime there's something move on the screen, they make a horrible buzzing sound+. The greater the movement, the more they buzz (or hum or whatever you want to say). Everything from moving the cursor back and forth to moving an entire window back and forth. Even if I turn the speakers down (via the audio interface), the volume of the buzzing remains the same. I booted the iMac in to Windows, and the sound is the same, so it is not an OS issue. I thought it may have been the video card making the noise (from within the computer), but the sound is definitely coming from the speakers.
Here's the punchline: if I run an extension cord from across the room and plug the speakers into it, the buzzing becomes substantially quieter. It's still there, but it becomes very faint. This leads me to believe that I'm dealing with a power issue in the computer, but am now uncertain what to do. I unfortunately cannot run this 50' orange extension cord across my studio for any amount of time.
Any suggestions would be greatly appreciated.
Thanks!
- Neal

Neal Gillis wrote:
Hi there,
I've a bit of a bizarre issue, and I'm wondering if anyone has any suggestions...
I recently acquired a set of Mackie MR5 reference monitors, and am running them through a Tapco LINK.usb audio interface. They work great, with the exception that +anytime there's something move on the screen, they make a horrible buzzing sound+. The greater the movement, the more they buzz (or hum or whatever you want to say). Everything from moving the cursor back and forth to moving an entire window back and forth. Even if I turn the speakers down (via the audio interface), the volume of the buzzing remains the same. I booted the iMac in to Windows, and the sound is the same, so it is not an OS issue. I thought it may have been the video card making the noise (from within the computer), but the sound is definitely coming from the speakers.
Here's the punchline: if I run an extension cord from across the room and plug the speakers into it, the buzzing becomes substantially quieter. It's still there, but it becomes very faint. This leads me to believe that I'm dealing with a power issue in the computer, but am now uncertain what to do. I unfortunately cannot run this 50' orange extension cord across my studio for any amount of time.
Any suggestions would be greatly appreciated.
Thanks!
- Neal
Neal,
Have you tried another mouse??? Maybe that is causing the issue...
Also, are you plugged into a 3 prong grounded outlet?

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