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Member for

20 years 8 months

Hello guys,
I have a horrible problem. My home-studio devices consist in an Imac G5, an M-Audio 410 Firewire soundcard and two KRK Rokit 6 Powered monitors. From some mounths the monitors produce a really nasty noise, actually not really a noise but something like a square wave with a constant frequency. At the beginning this sound used to start as soon as the monitor of the computer was going in standby, but now it starts already when I switch on the computer. Working for hours with this saw in the ears is terrible. What do you think about this? does it depends on the computer on the sound card or on the monitors?
Notice that I tried to substitute the 1/4" balanced connectors, but without luck. Also notice that switching on the audio monitors, and not plugging the connectors to the computer, doesn't produce this irritating sound.
I really would appreciate your help.
Thank you in advance,
Gpp

Member for

20 years 8 months

hummel Mon, 12/03/2007 - 16:22

You should only post in one forum. Triple posting might lead to all of your posts being deleted.

BRH Mon, 12/03/2007 - 20:06

I would call that a firewire interface, not a sound card. Have you tried trashing pref and/or reloading drivers? Maybe try a really expensive Monster firewire cable. Some people using the M-Box USB interface have complained about this type of noise, referring to it as 'The USB Whine.'
Some have fixed it with a better cable or making sure the cable is not near any other power sources.

MrJesus Mon, 12/03/2007 - 20:40

When I've gotten this sort of issue through a USB connection before it has been due to shoddy powering of the computer which the USB is hooked up to. Mainly laptop power supplies, but sometimes desktops. If the comp is a laptop, try running it off the battery and see if that works.

Member for

20 years 8 months

bigtree Mon, 12/03/2007 - 23:10

NOTE Admin Topic Edit:
Brought over from one of the other triple posts ( now all deleted)

Ardroth wrote:

Man.. I have a similar issue with my DAW and the monitors. I have this really nasty sound when I connect my computer to the Monitors... I've tried a lot of things to try to fix it... nothing works. I attribute it to my computer being very noisy. I have an HP Pavilion, and it's just a really noisy computer.

_________________
-Ardroth

http://www.bothildir.com

hueseph Tue, 12/04/2007 - 08:55

Would you describe this as a whine? If so, the issue is well documented concerning whining firewire interfaces.

From Harmony Central:

"At this point I remembered Paul White’s comments about processor cycling with respect to the Inspire 1394. Per his recommendation I had downloaded the CHUD utility from the Apple web site, which adds a processor option to the System Preferences menu under "Hardware." I opened it up, unchecked "Allow Nap," and…and…and…

The whine disappeared. Totally. 100% non-existent."

"To Anderton, I have a dual G5 and experienced the same whine with my FireBox, and like you, came across the CHUD tools which solved the problem. But, I also discovered an Applescript which can be downloaded and dropped into your Startup Items folder which will automatically uncheck the "Allow Nap" option to prevent the second CPU from idling:

http://www.cubeowner.com/kbase_2/file_d.php?id=60"

Hope that helps.

Member for

20 years 8 months

Gius Tue, 12/04/2007 - 10:15

Thanks to all of you.
I think it was an electric problem. I was plugging the feeders of the computer and of the monitors all together on the same wall outlet. Maybe the single wires were touching each other.
Now I have moved the two feeders of the monitor on another outlet. No disturbances anymore.
Thank you again
Gpp