Huge Feedback in studio monitors when using mini display port

Discussion in 'Monitoring' started by JamesBonz, Oct 31, 2011.

  1. JamesBonz

    JamesBonz Active Member

    Joined:
    Oct 31, 2011
    Location:
    United States
    I'm new to this website, and i'm not positive if i'm in the right forum, but I really need some help with my setup. I can't stand working on huge logic pro projects on my small laptop screen, so i got a nice Sony bravia LED monitor. But for SOME UNEXPLAINABLE REASON, I keep getting a deep feedback through my studio monitors whenever I have the monitor hooked up. The second I plug in the mini display port to HDMI adapter into my laptop, I get instant feedback, not like it even kicks in once recognized by my computer. My monitors are hooked up through my USB mixer, so i tried hooking the mixer up to the laptop with USB, and 1/8" to component, but both get feedback.... if anyone has any idea of how to get rid of this feedback, it would be AWESOME. Thanks
     
  2. JamesBonz

    JamesBonz Active Member

    Joined:
    Oct 31, 2011
    Location:
    United States
    I'll now add that when just running a 1/8" to component directly to the mixer from the monitor, I still get the feedback. Which means my monitor gives off feedback????
     
  3. TheJackAttack

    TheJackAttack Distinguished Member

    Joined:
    Mar 20, 2008
    Location:
    currently Billings
    HDMI cables also carry audio information so you need to make sure that you have that muted or disabled in your computer setup.
     
  4. Ewan

    Ewan Member

    Joined:
    May 27, 2012
    Location:
    UK
    I had a similar issue and it turned out to be a simple ground loop problem. I purchased a cheap 'Ground Loop Isolator' (Skytronic brand) from eBay and it cut 99% of the studio monitor feedback that I was getting from my LED monitor (via minidisplay) and even slight feedback from my MBP 13" mains adapter.

    Thought I'd return to this post to share the solution for others...

    (Most ground loop isolators I've seen are male to female RCA adapters rather than Jack/XLR etc. This suited me because I connect my monitors via an Audio 6 sound card Mono RCA to 1/4 Jack)
     
  5. MrEase

    MrEase Active Member

    Joined:
    Jan 19, 2006
    Location:
    West Suss ex, UK
    My first question is, is it feedback or a hum loop? The quickest way to find out with your setup is to unplug the mains adapter and run the laptop from its battery. Does the "feedback" go away?
     
  6. MrEase

    MrEase Active Member

    Joined:
    Jan 19, 2006
    Location:
    West Suss ex, UK
    Doh! Old post resurrected. Missed that....
     

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