Page 1 of 3 1 2 3 LastLast
Results 1 to 10 of 21

Thread: Electrical interference when recording

  1. #1
    Join Date
    Apr 2005
    Location
    Norwich
    Age
    40
    Posts
    377
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    6399

    Electrical interference when recording

    Sign in to disable this ad
    Hi. I've had a problem recording since getting my new dual core athlon pc. I originally posted this in the PC forum because I thought it was soundcard related but I have realised that it's an electrical issue.

    When I record a track I can hear an electrical interference. I have all my stuff set up with a patch bay and checked everything. It's now become obvious that the noise comes from the pre amps when they are plugged in (power). If I listen to the track coming from a pre that is plugged into the mains (whether it's on or not) the interference sound is present but as soon as I unplug the pres power cable the noise goes away. This is exactly the same with both the penta and twintrack.

    I haven't changed anything around except the PC and I can't just unplug that to test it! The extention leads are set up as 2 coming from the same port on the wall leading to 2 4ways.

    Am I right in thinking this is an earthing thing?

    Any help very welcome, I'm desperate to record some new tunes.


    ***Cubase sx3, AMD 4600 Dualcore, 2Gb fast RAM, ATI RADION graphics card 256mb, NTK, NT1000, SE2a, Penta, Twintrack, etc...***
    Just love me, worship me, do as I say... and I will be your slave.

  2. #2
    Join Date
    Nov 2004
    Posts
    5,661
    Thanks
    0
    Thanked 1 Time in 1 Post
    Rep Power
    441891
    have you tried moving cables around? signal cables crossing power cables can introduce all kinds of noise.

  3. #3
    Join Date
    Apr 2005
    Location
    Norwich
    Age
    40
    Posts
    377
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    6399
    Yup. No luck there. It's odd how it's just on the input signal, playback is fine.

    I haven't added any new devices other than the pc itself.

    What's also odd is that you can 'hear' when something happens on the screen... mouse movements, minimising pages. If you monitor teh signal coming in while doing other stuff the noise changes accordingly...
    Just love me, worship me, do as I say... and I will be your slave.

  4. #4
    Join Date
    Sep 2006
    Posts
    24
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    I had an issue similar to this with my monitor. Did you get a new monitor with the new computer?

    Try turning the monitor off and see if the sound goes away.

  5. #5
    Join Date
    Mar 2007
    Location
    Fox Island Wa.(Seattle area)
    Posts
    18
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Hey-

    This looks like a good place to get started.

    Internal soundcard, or USB/Firewire connector?

    Either way, you're probably dealing w/ 60 cycle hum.

    RF interference sounds like an old AM radio between stations.
    If it's a steady noise, doesn't modulate, you probably need a
    power conditioner.
    Household current's not great directly out of the wall for audio.

    For in the $100-130 range, I recommend a Monster Power strip
    (BestBuy, Radio Shack...).

    They make a huge difference.

    Kirk/FKA1
    IOMA award "Best Producer" 2004

  6. #6
    Join Date
    Apr 2005
    Location
    Norwich
    Age
    40
    Posts
    377
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    6399
    Internal M-Audio 24/96 x2 soundcards. No new monitor. Never had problem with power before... Stumped!

    If it's a cycle hum problem what can be done... other than the power conditioner?...

    Also what's the hum rate for the UK? Is it 50 rather than 60??

    Please keep helping
    Just love me, worship me, do as I say... and I will be your slave.

  7. #7
    Join Date
    Jun 2004
    Location
    far from lunch
    Posts
    3,119
    Thanks
    0
    Thanked 1 Time in 1 Post
    Rep Power
    444573
    Yes, you are in the UK, it's 50hz, not 60.

    First, try switching the suspect pieces to different inputs, see if that solves the problem. Also try different gear in the inputs where you are getting noise.

    Try running the suspect pieces straight into to computer, skipping the patchbay.

    The goal is to narrow down where the problem is.

  8. #8
    Join Date
    Jun 2004
    Location
    far from lunch
    Posts
    3,119
    Thanks
    0
    Thanked 1 Time in 1 Post
    Rep Power
    444573
    Quote Originally Posted by FKA1
    If it's a steady noise, doesn't modulate, you probably need a
    power conditioner.
    Household current's not great directly out of the wall for audio.

    Kirk/FKA1
    In my experience ground hum issues need to be solved where they happen. A power strip, no matter how fancy, can't help.

  9. #9
    Join Date
    Apr 2005
    Location
    Norwich
    Age
    40
    Posts
    377
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    6399
    Could this be an IRQ issue???


    The interference does change when I move my mouse of open/close windows... kinda like a static zipper...
    Just love me, worship me, do as I say... and I will be your slave.

  10. #10
    Join Date
    May 2006
    Location
    Chicago, IL
    Age
    38
    Posts
    153
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    53
    i noticed you are using an internal soundcard here. i am not too familiar with M-Audio products, but I am sure they offer shielding. I can replicate exactly what you describe with my ThinkPad's internal sound card. It I put on a pair of headphones right off the card, I can hear all the noises asscioated with the computer (click mouse, pressing keys) - there are serious of High FQ noises that go along with it. Is that a shielded card? It must be, so perhaps there is something wrong with the slots you are using on you machine?
    There is the theory of the Moebius, a twist in the fabric of space where time becomes a loop.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Question about recording
    By wolf70 in forum Recording Techniques
    Replies: 8
    Last Post: 06-06-2006, 18:14
  2. PC recording, not for the fence-sitters
    By Diragor in forum Digital Recording & Computers
    Replies: 10
    Last Post: 02-28-2006, 16:26
  3. Interference when recording
    By paltogue in forum Newbies
    Replies: 2
    Last Post: 12-05-2005, 03:49
  4. Delta 44 vs. Windows Recording Mixer. God help me.
    By Shepherd in forum Digital Recording & Computers
    Replies: 2
    Last Post: 06-09-2003, 06:39

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •