[Adam Sternberg]

I’m a photographer/videographer and shoot a LOT of conventions and conferences. The easiest way to record sound like this is to do it through a digital audio recorder, such as a Zoom or Tascam recorder. You can get a Zoom H1 for around $100 and they work awesome. You patch that into the mixer and you have a clean audio source coming right from the source. This also means you don’t have to run some long cable from the mixer to the camera. So once you record your separate audio track, you just sync it up in post. Very easy.

[Adam Sternberg]

Update!

I unplugged the DVI cable from the computer with the monitor on and the buzzing stopped.

So my thoughts are that the monitor is spewing crap back through that cable and that’s causing the problem. So what if I got a new DVI cable with some ferrites on it? In theory, that should solve the problem, yes?

https://www.amazon.com/Cable-Matters-Plated-DVI-D-Ferrites/dp/B007NJ3WI8/ref=sr_1_1?ie=UTF8&qid=1478807531&sr=8-1&keywords=dvi+cable+ferrite

[Adam Sternberg]

To answer your questions:

1. The speakers are about 6 feet away from one another. The monitor is in the middle of them.

2. I ran an extension cord/power strip in from another room and plugged the speakers into that. The buzzing was still there. I plugged the monitor into the new power strip and the buzzing was still there. I plugged the speakers back into their original outlets and the monitor to the new power strip and the buzzing is still there.

3. When I disconnect the audio cable (3.5mm to split/unbalanced 1/4 inch) the buzzing stops. Same goes for when I unplug the speakers.

I’m starting to think maybe it’s the cord running from the computer to the mixer…that 3.5mm to split 1/4 inch. If that cable isn’t shielded properly that might be the source of this problem. So should I get a new cable and make sure it’s shielded properly?

[Adam Sternberg]

Also, if I do get an external sound card, why would this fix the problem? The sound card would still be plugged into the computer via USB. Now to test this theory a bit, I unplugged the audio cable running from the sound card to my mixer and the buzzing did stop, so it definitely has something to do with it being plugged into the computer.

[Adam Sternberg]

So get an external audio card? I didn’t even know they made those.

[Adam Sternberg]

Sorry, “Generally” was probably a poor choice of words. Yes, I’m sure everything is running into the same circuit. It’s a home office I have setup in a second bedroom in the house so it would all be on the same circuit. I do have the monitor plugged into one outlet on one power strip and the mixer/computer plugged into a different powerstrip in a different outlet. I’ve tried mixing/matching and that doesn’t seem to change anything.