• Dese...

  

  77

  Re: Computer Recording - Hum related to LCD monitor

  Wed, September 19, 2007 - 11:34 AM

  Is it a 60 cycle hum? As in is it coming from your electrics? It doesn't seem like an LCD would throw radio frequencies, but I'm not sure what components exist in an LCD monitor. I'd recommend the usual. Check to make sure all or your gear is grounded. Try isolating the monitor on a separate circuit, Try swapping the monitor and see if the hum exists with a different monitor. Possibly the hum is being generated by your video card...
  
  Just woke up, so that's all I can think of at the moment. Good luck isolating the issue.

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• • Dese...

    

    77

    Re: Computer Recording - Hum related to LCD monitor

    Wed, September 19, 2007 - 11:39 AM

    Oh, one more thing. Wires make great antennas and so will pick up radio frequencies. So if the hum is not a 60Hz hum (electric) it is probably/possibly being generated by the components you have already isolated it down to. In that case, you might want to try using shielded cables on all of your audio gear if you don't already.

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• bifu...

  

  161

  Re: Computer Recording - Hum related to LCD monitor

  Fri, September 21, 2007 - 1:10 PM

  Thanks for the suggestions!
  
  I feel embarrassed to say this, since it's the audio engineer version of "did you remember to turn it on?" But as soon as i put the monitor on another circuit, the hum went away.
  
  Thanks again,
  
  bi

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    83

    Re: Computer Recording - Hum related to LCD monitor

    Thu, February 7, 2008 - 9:51 AM

    I've had a similar problem with my laptop and audio interface.
    
    I've found removing the ground from the laptop helps. I did this by buying a cheap ($.89) 3 to prong converter. This seems to be the best bet when you can't put something on a different circuit in a live situation.

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