Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17


Loud humming noise after boot with Creative Audigy 2ZS Platinum Pro and Klipsch GMX Promedia on digital input only

Posted on 2004-08-03
Medium Priority
Last Modified: 2010-04-25
Windows XP Pro Service Pack 2
Dell 530MT workstation dual hyperthreaded 2.2 gHz Xeon processors
Creative Labs Audigy 2ZS Platinum Pro sound card driver
Klipsch GMX Promedia speakers with digital optical input to Audigy hub digital optical output
nVidia GeForce FX 5950 Ultra graphics card driver
Belkin PCI USB/Firewire card
Logitech wireless keyboard
Logitech wireless optical mouse (Bluetooth)

When I connect my old Boston 2.1 analog speakers to the Line 1 out on the Audigy sound card, I get OK sound and no hum.

When I connect the Klipsch 5.1 speaker system to the digital optical out on the Audigy hub, I get a very loud hum.  It does not always occur, but today it does not go away.  This hum does not occur at initial boot but occurs at some point just before the login screen appears.  It is not constant; it seems to change with what is displayed on the screen.  Mouse movements also affect it.

Problem existed before installation of XP Service Pack 2.
Question by:TollandRCR
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
  • 2
  • +1
LVL 32

Assisted Solution

_ earned 150 total points
ID: 11712423
Try moving the speakers futher away from everything, and/or moving the cables to a different path.
LVL 69

Expert Comment

ID: 11714976
You can also try using better cables which are shielded.  It sounds like you are picking up interference from your monitor.

Expert Comment

ID: 11735904
Do you have front USB ports on your case?  If so, try connecting whatever is plugged into the front ports into the rear if you can. I've had a similar problem with a hum when using the front ports. They would hum whenever I plugged a mouse in and whistle when I plugged a USB keydrive in.
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!


Author Comment

ID: 11805539
I moved the Audigy soundcard to another PCI slot.  Hum went away.
LVL 69

Expert Comment

ID: 11805595
Since you solved this yourself, post a note in Community Support with a link to this to get a refund.

Author Comment

ID: 12255560
I have not yet posted points for the answers to this question, because the blasted hum has since returned.  However, another clue: the Klipsch speaker system is plugged into an APC UPS, which is plugged into the wall socket along with a wall lamp.  There is an interaction of this lamp, or its cord, with the speaker system, but it's not so simple as "lamp off, no hum" and  "lamp on, hum on."  It is almost unpredictable whether turning on the lamo will cause or eliminate the hum.  Does this make any sense at all?
LVL 69

Accepted Solution

Callandor earned 600 total points
ID: 12255611
More likely, then, is RFI in the power line.  Transformers and heavy-duty motors are prime suspects.  Check if anything else is plugged into the same breaker.
LVL 32

Expert Comment

ID: 12552142
Thank you much.    : )

Featured Post


Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

pc, laptop  monitor connection configurations
Skype is a P2P (Peer to Peer) instant messaging and VOIP (Voice over IP) service – as well as a whole lot more.
Finding and deleting duplicate (picture) files can be a time consuming task. My wife and I, our three kids and their families all share one dilemma: Managing our pictures. Between desktops, laptops, phones, tablets, and cameras; over the last decade…
Want to learn how to record your desktop screen without having to use an outside camera. Click on this video and learn how to use the cool google extension called "Screencastify"! Step 1: Open a new google tab Step 2: Go to the left hand upper corn…

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question