noise

Discussion in 'Digital Audio' started by colinmusic, Oct 3, 2008.

  1. macrumors newbie

    Joined:
    Aug 18, 2008
    Location:
    wales uk
    #1
    i bet this is a common problem. Apple os 10 goes out via usb to edirol ua 25 audio interface and then phono leads go out from edirol into home hi-fi and passive speakers to use as a monitor. There's a terrible hum coming from the speakers. Any idea what can be done?

    thanks colin
     
  2. macrumors 68040

    Killyp

    Joined:
    Jun 14, 2006
    #2
    Does it do it on all the amp's sources?
     
  3. thread starter macrumors newbie

    Joined:
    Aug 18, 2008
    Location:
    wales uk
    #3
    noise

    the answer is NO. Only on the mac. I have a PC connected to the same amp and this is noise-free.

    My local music shop told me to remove the earth from the amp plug.

    is this a possible cure?

    thanks for the interest

    colin
     
  4. macrumors 68040

    Killyp

    Joined:
    Jun 14, 2006
    #4
    Sounds as though you've got a ground loop. Yes, removing the earth from the amp would fix this but I really wouldn't do it personally. The amp is earthed for a reason.

    Have a look at this link. Fixing ground loops isn't the simplest task in the world, but it's doable.
     

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