Buzzing in monitors

I just bought a used pair of KRK RP5s, along with an extended warranty from Daddy's Junky Music. I'm getting a buzzing in one of the monitors, primarily with bass drum hits or other signal spiking--it's not there when nothing is playing. However, the levels in Logic are pretty low, and not coming close to clipping. On the other hand, I don't hear any buzzing when I listen to music through iTunes. I'm ready to take it back in to the store and get it fixed, but I want to make sure the problem isn't elsewhere in my setup. Can anyone think of anything else that might cause this problem?

Sometimes a similar thing happens to me, where all audio is crakley/distorted from Logic, iTunes, everything. My only recourse is to reboot. (luckily this only happens maybe once every three weeks)
Also you may want to consider upgrading your OS, as I'm sure CoreAudio has been updated in the last three incremental OS versions... but clone your Boot drive first, of course!

Similar Messages

Buzz when using 1/4 inch cables?

Hi there,
This isn't a question about Logic per se but I figure this would be the best place to get an answer.
So I've found using many different setups that I consistently get a low-level buzzing when monitoring or recording from a 1/4 inch cable.
I've used an M-Audio MobiePre as well as an Apogee Duet with the same issue (although the Duet did do much better at minimizing it). It doesn't come up when recording from microphone XLR's. It happens recording both my several keyboards and electric guitar.
My assumption was that it's a grounding issue. I bought a grounded outlet protector to no avail, tried a few different patch cables, plugged in my mac and keyboard to the same or different outlets in different homes. Tried with the mac running off battery, wi-fi and bluetooth disabled, all the electronics in the house off, cellphone gone, nothing seems to do it. Only once have I managed to get rid of it, but I've never been able to duplicate.
Is this a macbook hardware issue? I'm not sure who I should be calling to troubleshoot this with, Apple, M-Audio, my keyboard or patch cable providers or manufacturers...
Any thoughts would be much appreciated. Thanks for your time,
ADAM

If you are using the SAME 1/4" CABLE, please replace it with another one, and see if the hum goes away.
Otherwise, get a DI with Ground disconnect capability (most have this) and use that to plug into your Mac.
Cheers
PS remove the ground protector... unless you want to blow up your gear!!!

Why am I getting an intermittent buzz with preamp and studio monitors?

I've just gotten rid of my desktop computer speakers which plug into the mini-headphone audio out on my Macbook Pro (i7, 2.66, mid 2010). Instead, I've connected via firewire 800 to an older 8 ch Presonus Firestudio Project preamp, and have connected a new pair Fostex powered studio monitors to that for my audio (and scratch recording). When I first start playing music in iTunes it all sounds great. But after a while, I'l start to get these periodic loud electronic buzzes. It's not just in the background, it actually will cut off the song to make the loud sound for a brief second. Over time it will become more frequent, and at one point it got to the point that it was just a constant buzz, no audio at all. Unplugging firewire stops it. Since there are a number of components, I'm not sure what is causing the problem. Can anyone help?

The update didn't apply correctly, which will be typically due to an interuption within your setup. You will have to connect to iTunes via micro usb to restore.
http://support.apple.com/kb/HT4367?viewlocale=en_US&locale=en_US

Buzz/hum when connected to krk studio monitors

ok so i have an imac (3.06 ghz intel core duo). i had a klipshe 2.1 speaker system connected with no problems. then i bought a pair of krk rokit 6's studio monitors and just have a whole lot of humming now. so far ive connected headphones to my imac and no hum.... connected my ipod to the krk's and no hum..... connected my krk's to my macbook pro (while it was plugged into the same outlet as my imac) and no hum..... bought a m-audio fast track and connected the krk's through that to my imac and still it hums.... what gives? please help. thanks
shawn

Shawn, I am getting a 1 KHz whine through Behringer Truth monitors using M-Audio USB Fast Track Ultra audio/midi interface with an iMac i5 27-inch with LED monitor. The whine occurs continuously from the moment I open Logic Studio or iTunes, when the output is routed through the Fast Track Ultra. The whine does not occur when I use the imac output to imac's speakers. I also get an electronic scraping noise when I use the blue tooth connected magic mouse. I have installed ferrites on the monitor speaker wires with no reduction in the whining noise or electronic scraping noise. I have also ordered the USB with ferrite collar to see if the connection between audio/midi interface and the imac is the source of the noise. I am considering a Hum-X, as well, but I am getting into serious money taking stabs at a problem for which there ought to be plenty of competent technical support. The fact that this whine is at 1 KHz and not lower suggests that I am not suffering a typical ground loop. I am a former Pro Tools user who never had a hum or whine from my Digi and G4, which I am seriously considering recomissioning so I can make music again. I am spending way too much time and money making educated guesses and trying to diagnose a problem that all but kills the utility and purpose of this new system. I too am calling on all great engineers to step up with a diagnosis and solution.

Buzz on Audio using Monitor

Hi
I have a temporary setup from my MacMini to a small LCD TV which has no hdmi socket but has other ports. I am using the PC port on the TV via the mini display adaptor and the picture is ok.
But I want to put the sound through the TV as well rather than the MacMini speakers. on the TV is an audio in jack of the same size as the headphone/audio out jack on the mac. I have connected the two but on the TV the sere is a constant buzz in the background. I have also tried the connection to a CD player which has an audio in jack and get the same buzz. The sound is there.
Any thoughts?

This usually occurs when things are plugged into the same electrical outlet or are on the same circuit. Do you have a way to plug the TV and the Mac mini into separate outlets?
Dah•veed

Is my Mac Pro the cause of high pitch monitor noise?

I am encountering a faint but persistent high pitch noise through my Yamaha HS-50M monitors when my Edirol FA-66 interface is plugged into my computer via firewire ca ble.
I've read all these threads which sound very similar to my issue and have tried all the pertinent recommendations presented so far:
Monitor buzzing noise NEED HELP!
Help fixing signal hum/mouse coming out of monitors?
Electric shocks and Noise in a home studio
KVR :: View topic - Interference question. Computer and external audio interface
Just to be clear, my problem is similar but not identical to the problems listed in the threads above. Mouse movement or computer activity doesn't effect the monitor noise I'm hearing at all, it is merely a constant sustained high frequency tone that's emitted from my monitors when my FA-66 interface is plugged into my MacPro via firewire cable. My speakers are silent (aside from their own self noise) so long as my FA-66 isn't connected directly to my computer. Even when my FA-66 is powered on via its AC adaptor but not connected to my computer via firewire cable there is no added noise in my monitors. It's just when I make the firewire connection between my interface and my computer that the high pitch noise appears in my monitors.
I used to run my Edirol off of my older MacBook and never had this issue. I just recently upgraded to a new MacPro and am encountering this issue for the first time.
Since the noise is eliminated when I disconnect the firewire cable from my interface, I believe the sound is being caused by interference from my computer, which is then transmitted through my firewire cable into my interface.
My setup is this:
Grounded Wall Outlet > Furman Power Conditioner > MacPro Desktop Machine > Edirol FA-66 > Monitors
I am using TRS-XLR Mogami Speaker cables to connect my interface to my monitors and am using Mogami cables throughout my system.
All of my audio gear is being powered through my Furman power conditioner: my computer, my FA-66 interface via its AC adaptor (not firewire bus powered), my speaker monitors, and all my other audio equipment.
I don't believe I'm picking up interference from any of my other cables and wiring and this doesn't seem like a grounding issue. Like I mentioned, the noise is gone when I disconnect the firewire cable from my FA-66 interface.
I do have some other hardware in my setup (my computer screen monitor, a USB hub, AC power supplies and cords to power external hard drives, a lamp) that are receiving power from a separate surge protector strip plugged directly into a different wall outlet than the one my Furman conditioner is plugged into. I don't believe any of these other devices are the cause of the interference noise because when I unplug all these items from their respective wall outlet, I still hear the exact same noise when my FA-66 is plugged into my computer via firewire cable.
All signs seem to point to my firewire cable and/or my computer.
Originally I started with a different firewire cable and swapped it out for a newer and higher quality, gold-plated firewire cable meant to cut down on interference. This cable swap did help reduce some of the noise my monitors were picking up, but did not eliminate it entirely.
I then invested in some ferrite core clamps and placed those around each end of my firewire cable (one right by my computer's firewire port & one right by my FA-66's firewire port). This helped a little more but did not eliminate the high pitched sound entirely, just made it even quieter. The hole diameter of the ferrite core clamps is slightly larger than the diameter of my firewire cable, however, and I'm going to order more clamps with a smaller hole diameter that will ensure a snugger fit around my firewire cable. Do you think this may help things more?
I also lifted the grounding pin in my Edirol, tied a copper grounding wire around it and connected the other end to my MacPro's metal case with alligator clamps in an effort to better ground the two suspect pieces in the chain. This seemed to have little to no effect beyond what the ferrite cores were able to clean up. (I got this idea from the GS thread contained in the first link above.) I don't know much about hardware electronics but thought I would try this out just to see if it would help. The fact that it didn't help, to me, seems to reaffirm that the system is grounded properly, because if it weren't I would have possibly noticed an improvement by making a grounded connection between my interface and computer. Please correct me if I'm wrong about this.
I even tried plugging my Furman power conditioner into an entirely different wall outlet, but this didn't change things at all. I do have one more unused wall outlet I can try but don't think this will make much of a difference because I'm 99.99% sure this isn't a grounding problem and that the sockets I'm using are properly grounded. My Furman isn't registering anything abnormal and seems to be functioning properly.
As of right now I've been able to make significant improvement to the noise problem and have eliminated it by 90%. The high pitch noise through my monitors is virtually eliminated but I still notice a faint bit of added noise when interface is powered on and connected to my computer via firewire versus when the firewire cable is disconnected.
Could my MacPro be outputting some kind of interference which is being picked up by my firewire cable and transmitted to interface and monitors? I've read that sometimes a computer's power supply unit can output a large amount of EMI or dirty electrical interference. It seems surprising to me that Mac's professional desktop machine would cause a fundamental issue like this though, especially since it is designed for being able to work in a professional audio recording setup.
Any other ideas people can provide as to what may be causing my added interference and how to treat it would be greatly appreciated. Thanks in advance for your help!

What kind of sound card are you using exactly? It seems like you're sound card is picking up EMI or RFI from your computer when it's plugged into a wall outlet. Are you using a power conditioner in your setup to help clean up your power supply?
Try googling EMI & RFI, there are many online resources which detail how to troubleshoot and deal with these problems. http://www.arrl.org/radio-frequency-interference-rfi
I finally solved my problem by upgrading to a higher quality audio interface (Focusrite Pro 40). This was able to cut out the high frequency RFI signal being output from my MacPro computer. I get the feeling many of Mac's higher end computers tend to output dirty electrical signals which is why so many people have this similar problem.
Try cleaning up your power supply, then maybe use different, higher quality sound cards or interfaces with your setup to see if the issue gets solved. The problem most likely lies with your computer and if you can get a high quality interface that can cut out the noise, that may be your only solution. It worked for me.
Good luck!

Strange issue with external monitor, only working when external speakers plugged in (using Thunderbolt to VGA adaptor)

Hey – I am having a very strange issue with my external monitor; where it only works if my external speakers are plugged in and connected.
I am using a late 2011 Macbook pro, running Mavericks 10.9.4, along with an MBox 2 (USB Audio Interface), and two powered speakers (KRK Rokit 5). This setup has had no issues. I have just acquired an external monitor (Benq T2200HD), which I am using with a thunderbolt to VGA adaptor (a cheap Chinese knockoff adaptor).
To start - I plugged the monitor in with the thunderbolt adaptor, and it powers up and works fine. However, there is a nasty buzz coming from the speakers. I did some research and it looks like a simple ground loop issue. I did a bit of troubleshooting, and this is where things get weird.
What I found is - If I unplug the MBox, the monitor loses signal from the computer (displaying ‘No Signal Detected!’). Further, if I keep the MBox plugged in, however unplug both the cables from the MBox to the speakers, the monitor loses signal. It doesn’t matter if the speakers are turned off, however they need to be plugged in (or the monitor loses signal). Weirder still, I can unplug the MBox, however the monitor will work if I plug in the speakers through my macs headphone jack.
Simply put, the monitor only works if there is a direct connection between the computer, the speakers, and the power source. What is going on here? Is the monitor grounding through the computer port, to the speakers (I don’t know how this works, is this possible?). Could it somehow be the cheap VGA adaptor I am using?
Some other information:
- Everything is plugged into the same multi-box for power. I have tried plugging things into separate sources, and the result is the same.
- If I unplug the thunderbolt adaptor, then the speaker noise disappears straight away.
- The ground noise doesn’t appear in my headphones, which are plugged into the MBox.
Any information would be great – am I missing something here, or is this genuinely weird?

Well, I went back into Best Buy to test on 3 other laptops (2 Asus, and their floor model for this Sony). It seems to be doing the same problem so at least I was able to rule out broken hardware issue on my particular laptop.
Here's what I did to test:
Since I couldn't really install Adobe Premiere on their machines, I used the DVIO software (http://www.carr-engineering.com/dvio.htm) and a 5 min clip I captured. I transferred onto their machines, hooked up my Sony D8, and attempted to play the video. It would play for 15 seconds and then stop and jitter with a loud noise (like it does on my laptop). I even tried changing each machine's firewire driver to the legacy one and same results. I pulled a brand new 4 pin to 4 pin firewire cable off their shelf and still the same problem.
I think I've nailed it down to Win7x64 bit Home Edition not playing nice with Firewire driver. Very annoying. I can't find any concrete evidence of this from other users on any of the forums that have my particular problem, but from my own testing, it's all I can conclude.
I have 2 other things I can try:
1. Opening the laptop and looking at the firewire to maybe find appropriate driver (ugh, I don't want to have to open this thing up).
2. Upgrading to Win7x64bit Pro and possibly testing with XP on the new MS Virtual PC (http://www.microsoft.com/windows/virtual-pc/). I can't do it with my Home edition apparantly.
Who needs to view video on an external TV anyways....sheeesh...(scarcasm).
Tim

Shaking image on external monitor when Satellite A200 is running on AC

Hello
I have this problem which is driving me crazy .... I bought an external monitor for my Toshiba Satellite A200-1s9 laptop but the problem with it is that the image, on the external monitor, is shaking. I tried another monitor, the same, another cable, same problem; the only way how to stop it is to unplug the AC from the laptop.
I also tried to move the monitor further from the laptop but nothing.
I can making stop shaking so hard only if I switch to the AC profile from FULL POWER to Save power ... but even with this the image is still shaking a bit.
So basically there is a magnetic field around there, probably in the laptop, which is making my image shaking like crazy ... does anybody know how to stop it?
tx

Hi,
hmmm...
I don't think that this has to do something with magnetic fields.
Cause it is related to the power consumption of the computer, it seems that there is a problem with the AC-Adaptor.
If it has to deliver much 'juice', it's condensators to keep the voltage absolutely stable are perhaps too weak.
Such instabilities ( which have the 50 Hz frequency of the power supply ) can disturb the signal to the monitor.
A solution for that ? ..if you know how to solder some fat condensators somehow in between...
Or:
It's a grounding problem
I never heard from such problems with LCD-Monitors (VGA out??). Mostly this is the case when you you use analog video out,
leading to no color on the TV.
Do you have an annoying buzzing when you connect audio out to an amplifier ? That would be a sign for that.
I had such a problem and solved it by plugging my laptop on AC on another circuit in the house than my audio devices
So experiment with that.
First: disconnect all other stuff ( printer, sticks, antennas, everything ) These are nasty problems with lots of possible interferences.
Let me know!
Greets Matz

Computer Issues (Monitor, Freezing, etc) --- Someone Help me Please!

So for the past month my computer has sporadically froze and this mesage has appeared
"Input Signal out of range, change settings to 1280 x 1024-60 Hz"
Then after awhile it says:
"Monitor going to sleep".
After that, I cannot get the monitor to turn back on, even though the computer tower still stays on. But i have noticed the flashing orange light on computer tower that is usually on when the computer is working goes off.
Once before the monitor just shut off and went to a blue screen that had a semicolon in the top left hand corner.
Also, the monitor froze just today and a loud buzzing/crackling sound almost like the white noise from a TV came on. I had to restart my computer and here I am now typing this out.
With all these problems I usually have to restart the computer. But sometimes when I try to restart the system, it jut goes to that "Monitor going to sleep message" and will not let me log on.
So I usually am stuck restarting several times before I can log on.
I have an HP vs19e 19" Flat-Panel LCD monitor. My computer is a HP Pavillion a1524n.
Thanks in advance for any help.

"Monitor going to sleep" generally means no video signal. Test your monitor and cable on another PC if you can.
Try some of these articles.
HP DV9700, t9300, Nvidia 8600, 4GB, Crucial C300 128GB SSD
HP Photosmart Premium C309G, HP Photosmart 6520
HP Touchpad, HP Chromebook 11
Custom i7-4770k,Z-87, 8GB, Vertex 3 SSD, Samsung EVO SSD, Corsair HX650,GTX 760
Custom i7-4790k,Z-97, 16GB, Vertex 3 SSD, Plextor M.2 SSD, Samsung EVO SSD, Corsair HX650, GTX 660TI
Windows 7/8 UEFI/Legacy mode, MBR/GPT

My monitor made a weird noise and now it won't turn on.

What's up guys, how is everyone doing?!
So i walk into to my room today and I hear a weird, dull buzzing noise coming from my 27" Thunderbolt Display. I then proceed to turn on my MacBook Pro, which it is connected to and the noise gets much much louder! i checked to see if it was the speakers... It wasn't...
so I unplugged the monitor and plugged it back in.... Now it wont even turn on..... The charger port doesn't work either so I'm guessing that it's getting no power at all.
Has as anyone else faced this problem? What should I do? Please help!

Please make a Genius Appointment and take it in for service.

URGENT: Monitor choice for New G5s (Nov 2005)

Sorry bout the "Urgent" but I need to decide on following before purchasing new G5 (Quad or Dual-Core 2.3) and Apple Monitors only have 3 year warranty if purchased with the computer.
SITUATION:
I plan to go with either the default NVidia Geforce 6600 or the NVidia 7800GT(+$350) * Both cards (PCI Express models) - only have DVI ports (1 single link, 1 dual).
--I am truly baffled at how this (DVI vs VGA) affects both features and screen image)
MY CONCERNS: (please consider these in your answers)
* Text:I stare at text for the better part of the day so Sharp Text is VITAL.
* Color: Good color (proper balance consistency & controls) but most important: Monitor to printer translation so a good color profile counts, (most of my final output via ID to local Phaser6250.)
* Compatibility: ie will I be able to take advantage of advertised features via DVI
*Lastly: I don't give a hoot about gaming, DVD playback not a big concern. I want a monitor functions well for running computer applications. Stuff like USB ports and media readers nice but not deal breakers...
SUMMARY OF ISSUES
In most ways, the HP & Dell models sound preferable (feature wise). BUT:
* Will I have the same controls & adjustments (brightness, contrast etc) available for these, (specifically since I'll be connecting via a DVI port) THIS IS VITAL. (but..don't care about Portrait mode)
* Will image/text look as good on a Mac as a PC?
* I assume there will never be Mac drivers for either of these, spooked that this will limit functions and/or could cause compatibility issues in the future.
How would I get color profiles for these?
MONITORS BEING CONSIDERED
As i can find no good advice on CRTs I've pretty much narrowed my choice to following 23" LCD's (all priced similarly $1200-1300):
Following info from misc sources (of varying in reliability) the Web, sources but specs correct.
1) Apple HD Cinema 23":(often compared poorly to Dell, but users seem to love) 25.6 dot pitch
Pros: Can count on compatibility: Firewire ports, aluminum bevel
Cons: Color issues: I hear there's a pinkish tint around edges, and generrally uneven color across the screen., greenish tint in greys. If my printouts match the screen I can live with this. **DVI ONLY
2) Dell 2405FPW: (a lotta buzz on the net, good reviews) 27 dotpitch
Pros: Better outputs: (DVI, VGA, Composite, S-Video, component video), better contrast),
Tilt, turn, Raise. (not a deal breaker)
Cons: Compatibility?. I heard this screen runs too bright even with adjustment (at least on a Mac), large dot pitch, questionable support
3) HP L2335: (editors choice MacWorld Jan 2006) .258 dot pitch
Pros: Better outputs: (DVI, VGA, Composite, S-Video, component video), better contrast)
Programmable user modes (have this on my current monitor - really nice), Tilt, swivel, Raise.
Cons: Compatibility?. questionable support, (supposed to be pretty ugly, but don't about this.
FINAL QUESTIONS:
Has anyone worked with 1 or more of these monitors ON a Mac via DVI? --comments?
Since there's no way to view PC Monitors under these circumstances...
* Can anyone comment on what questions I'd need answered to determine compatibility/feature function ability (via Mac DVI)?
* Am I being paranoid about my using PC Monitor concerns. (my greatest being, that if things poor out of box will get little to no help from manufacturers).
Sorry so long, trying to be clear, THANKS IN ADVANCE- Xandra
PMac Quicksilver, PBook G4 Titanium, iMacDV SE Mac OS X (10.3.8)
PMac Quicksilver, PBook G4 Titanium, iMacDV SE Mac OS X (10.3.8)

I recently purchased the 2405FPW in Canada for $900 CAD (in fact its still on sale) with free shipping. I can highly recommend it. It is certainly not too bright. I have zero dead pixels and am actually surprisingly impressed. Video playback was better than expected and reading Text is very easy at its optimal resolution of 1900x1200.
That being said, is 1900x1200 TOO sharp/small? The monitors performance does vary based on its resolution. The colour is also quite good. Not too oversaturated as with many LCD's (or washed out for that matter).
I suggest you familarize yourself with Colour Calibration Tool (go to Display Properties, Color Calibrate...)
The other big factor for me is the Component Video In that I am using to hook up a High Def signal (yes this is a capable HD TV). Don't kid yourself this is an excellent feature.
In regards to your concerns you can do ALOT of alteration of the LCD via the OSD (the on screen display). But you should make sure to setup ANY LCD via color calibration tool.
Images and text look better on a Mac than a PC in my opinion due to the nature of Quartz Extreme and Quartz font smoothing (your video cards will be excellent at utilizing these features).
In regards to drivers, NIETHER need it. You plug it in (I've used both) and the OS will automatically switch to the default resolution and the default color profile is installed (I tweaked the color profile a little via the color calibration tool...). Yes its true plug and play.
I've never used the HP but I own the Dell. I've tried the Apple. Personally, the Apple looks better physically (but you say you don't care) and it does have a smaller dot pitch (I couldn't notice a big diff and I saw them side be side). The Dell is brighter (you can turn it up or down to your preference) and has better contrast. I LOVE the component in on the dell and have a HD game system hooked up and it looks marvelous.
I also found the Dell more adjustable. Both the dell and the apple are excellent monitors and you can't go wrong. For me the addition of Component in for HD as well as a significant price difference (almost $800 CAD when taxes are added up, heck I could almost buy 2 dell for the price of 1 apple) made me buy the dell and so far I am very happy with it (although I now have to turn my head to game :D)

Buzzing sound

Hello everybody. Recently i bought mac pro ( from this auction: http://www.ebay.co.uk/itm/201136982439 ) and on the beginning was perfect. Yesterday i had problem with fans ( my brother was unzipping zpaq file and set program to use all 8 cores, and computer has turned on all fans on 100%, and the noise was terrible. After that situation, the fans. started working on 100% all the time, even when i was doing nothing on computer - but it stopped, while i unplug power cable, so now is ok). But today again.. It is buzzing again (different buzzing style), (i`ve record a video : http://youtu.be/vuxeHMSpYlE ), and computer is heating alot. I shutted it down, because i am afraid to not burn any parts inside, but could anyone help me and tell me, what is wrong with this?
Thanks for all responds

Hello,
Have you blown the dust out lately?
Get Temperature Monitor to see if it's heat related...
http://www.bresink.com/osx/TemperatureMonitor.html
What are the high temps?

Strange issue with external monitor, only working when external speakers plugged in

Hey – I am having a very strange issue with my external monitor; where it only works if my external speakers are plugged in and connected.
I am using a late 2011 Macbook pro, running Mavericks 10.9.4, along with an MBox 2 (USB Audio Interface), and two powered speakers (KRK Rokit 5). This setup has had no issues. I have just acquired an external monitor (Benq T2200HD), which I am using with a thunderbolt to VGA adaptor (a cheap non-apple adaptor).
To start - I plugged the monitor in with the thunderbolt adaptor, and it powers up and works fine. However, there is a nasty buzz coming from the speakers. I did some research and it looks like a simple ground loop issue. I did a bit of troubleshooting, and this is where things get weird.
What I found is - If I unplug the MBox, the monitor loses signal from the computer (displaying ‘No Signal Detected!’). Further, if I keep the MBox plugged in, however unplug both the cables from the MBox to the speakers, the monitor loses signal. It doesn’t matter if the speakers are turned off, however they need to be plugged in (or the monitor loses signal). Weirder still, I can unplug the MBox, however the monitor will work if I plug in the speakers through my macs headphone jack.
Simply put, the monitor only works if there is a direct connection between the computer, the speakers, and the power source. What is going on here? Is the monitor grounding through the computer port, to the speakers (I don’t know how this works, is this possible?). Could it somehow be the cheap VGA adaptor I am using?
Some other information:
- Everything is plugged into the same multi-box for power. I have tried plugging things into separate sources, and the result is the same.
- If I unplug the thunderbolt adaptor, then the speaker noise disappears straight away.
- The ground noise doesn’t appear in my headphones, which are plugged into the MBox.
Any information would be great – am I missing something here, or is this genuinely weird?

Hello cgoldberg11
Please go to the below link to test if you are having a speaker hardware failure.
Testing for Hardware Failures (Windows 7)
This will rule out hardware failure, let me know how that goes.
Thanks
If I have solved your issue, please feel free to provide kudos and make sure you mark this thread as solution provided!
Although I work for HP, my posts and replies are my own opinion and not those of HP. .....
Reguards,
Mo

Buzz In Audio When Using DVI Output

I've had this problem for a while now, but everytime I plug in a monitor to the DVI port I get a horrible buzz out of my audio interface. I've tried everything: using different DVI cables and audio cables, using different audio interfaces, disconnecting everything except the necessary things, etc. and no matter what, the buzz comes when I plug something into the DVI port. I'm assuming that this has to do with the video card, I'm just wondering if anyone else has had problems like this.

Are the TV and the Mac plugged into different wall outlets in the room? It could be they are on widely different circuits, considering the wiring behind the wall, and that stray currents are flowing through the signal cables and upsetting the signals carried on those cables.
If the above is true, try plugging the TV into the same outlet as the Mac and see if things improve.

Thunder Bolt to Monitor and Firewire to Audio Interface Problem

Hello. I just purchased 2 studio monitors for producing. I have a audio interface connected from my firewire plug on my 15 inch mabook pro, which are going out to my speakers. Thats all fine, but whenever I plug in my thunderbolt to hdmi adapter going to my other computer screen, it makes a really annoying buzzing sound. I can like hear all the buzzing and sounds inside my computer hard drive or something, its weird. Does anyone know why this is happening?
Any help would be appreciated.
Thanks!
Zach

Hi Studzik,
Welcome to the discussions.
Ummm ---- given that you have a G5, maybe it's better that you post this is the iMac G5 section of the discussions (this is the flat panel iMac G4 section that you have posted in). That way, you have a greater chance of a G5 iMac user familiar with your issue picking it up and being able to help you.
All the best, hope you find a solution.
Cheers!
Karl

Buzzing in monitors

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