Before I try to invest in better cables, i was wanting talk about an issue i'm having.  I have some Yamaha HS5 monitors.  They are right beside my monitors. Not something I can really help too much given my operating area.
 
I have noticed that when monitor is refreshing something like a web page, I get an annoying buzz from my monitor.  If I'm not doing anything on my computer, they are quiet as you would expect and want. I have everything plugged into a nice power conditioner/power strip.
 
At first I thought it could be some kind of interference between my computer, through the USB cable into my Roland Octa-Capture. However, if I turn my Octa-Capture off, I still hear that buzzing sound.  So, I'm wondering if anyone has ever had this problem and if so, did you find upgrading your XLR cables for the audio monitors, and the perhaps updating the HDMI cable for the computer screen/monitor removed that annoying buzz?
 
Thanks for any help.
Rick

Have a look here
 
http://forum.cakewalk.com...m-SOLVED-m3107823.aspx

I have noise in one of my Yamaha monitor speakers.  The other one is totally quiet.  Noise doesn't change with the volume on my sound card.  I've had a hard time fixing this issue.
 
Jim

haydn12, yeah right???  My right monitor is FAR worse than my left.

 
What happens if you move the monitors away from your screens ?
 
I presume your monitors are active and can therefore amplify any stray signals picked up from nearby.
 
It may be a question of inadequate shielding of the electronics in either the screens, monitors or both.
 

Agreed, always trouble shoot issues by taking things one at a time and making changes,like swapping out cables, move equipment etc. Example, you say the right monitor is the culprit, swap it with the left and see if the issue moves too. That immediately rules out that the monitors are  the problem, then swap cables etc. 
 
I get strange noises in my system that seem to originate from the graphics. 
If you even move the mouse it happens. 
I had the same thing years ago with a certain set up. 
Last system was dead quiet, now this system has the noise again. 
Haven't had time to trouble shoot because it's not interfering with recording but it's annoying. 
 
 

 
I get a whine from my Dell monitor/screen when it's adjusted to certain settings.
 

First step: remove the cables going to the monitors and see if the buzzing stops or is greatly reduced. That will tell you if the problem's inside the speakers or elsewhere. You can also swap the cables and see if the left speaker is now noisier than the right.
 
Also make sure you're plugging your speakers into a properly-grounded outlet, ideally adjacent to the outlet and on the same circuit as your audio interface.
 
If the buzz is gone when you unplug the cables, plug them back in and unplug them from the audio interface side. If the buzz goes away, it's not your cables.
 
 
 

This is a very common problem, and basic trouble-shooting, as described above, is the way to go.
 
Some additional ideas:
1) is it a hum or a whine? A hum suggests a 60 Hz problem, a whine suggests something a tad higher in the spectrum. Hum is magnetically coupled, whine is electrically coupled. Shields do nothing to reduce magnetic coupling, but a good twisted pair does. Shields do a lot to reduce RF interference. So you have to identify the problem.
 
2) There is a lot of chatter about ground loops. For the most part you need to forget about ground loops, they are not the problem, and in fact they make life safer. Instead think in terms of victim and aggressor. Once you have determined if the interference is power line or RF you can start looking for victims (the loudspeakers) and aggressors (maybe the monitors, maybe other noise impressed on either the audio or power lines.)
 
3) When these loudspeakers were originally released I believe they suffered from the dreaded "Pin 1" problem - that is, the shield was connected to the inside of the cabinet. I also believe that Yamaha resolved the problem. So depending on how old your loudspeakers are you may want to look into "Pin 1" problems.
 
That, and Bit's description above ought to get you started. Come back with more info and we'll figure this out!
 

I didn't do any investigative work tonight.  I will do some more tomorrow.  But, it's more of a crackly buzz than anything else.  When I unplugged the usb cable from the back of my Octa-Capture the noise seemed to stop. Could have been a coincidence, will have to test it again tomorrow.
 
In a week I will be getting a bigger desk and will be able to push my speakers out further away from my monitors. But, I'm not convinced that those are even the issue.  Maybe, but not positive.  At this point, I'm thinking it has more to do with the USB connection from the computer to the Octa-Capture.
 
I know that when I use my mouse wheel on some web pages, as I scroll, I get a lot of noise, when I stop using the wheel, the noise stops, or at least fades substantially. 
 
Regarding the Yamaha HSM-50s.. They are about 2 years old. Bought them brand new.