Weird audio phase cancellation when capturing with iSight

Discussion in 'Digital Video' started by stringtheorist, Aug 14, 2008.

  1. stringtheorist macrumors regular

    Joined:
    Apr 1, 2008
    #1
    When I first got my iMac (OSX 10.5.2 with Leopard) I had no problem capturing audio/video in iMovie using my built-in iSight. Lately however I get a strange, undulating phase-cancellation sound appearing on the audio track about 10 seconds after I start recording. I can't hear this through my Mac when I'm recording, only during playback. It completely messes up my guitar movies.

    I have since downloaded iMovie '06 but I get the same problem there too. Is there a fault with my internal mic? What else could be wrong?

    Thanks in advance.
     
  2. Poeben macrumors 6502

    Joined:
    Jul 29, 2004
    #2
    You're not monitoring your audio through speakers while recording are you?
     
  3. stringtheorist thread starter macrumors regular

    Joined:
    Apr 1, 2008
    #3
    Yes but I've always done that and never had any problems before. Besides, I tried it with the speakers turned off and I still get it.
     

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