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  1. Member
    Join Date: Mar 2004
    Location: United States
    Search Comp PM
    I filmed a presentation and recorded the audio separately using a PC.

    The problem is that the audio has a very audible buzzing in it.

    Is there any way that I can remove this?

    Any help would be appreciated,

    -Tchail
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  2. Mod Neophyte Super Moderator redwudz's Avatar
    Join Date: Sep 2002
    Location: USA
    Search Comp PM
    You could try filtering it with the freeware audio editor Audacity. Try the noise filter after clipping out some representative buzz.
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  3. Member
    Join Date: Jul 2010
    Location: UK
    Search PM
    In Sound Forge, I'd use the Paragraphic Equalizer. The idea is to isolate the frequency range of the buzz and lower the gain for just that range. There's a guide here, which includes several presets for buzz removal: http://www.digitalfaq.com/guides/video/restore-audio-soundforge.htm
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  4. Mod Neophyte Super Moderator redwudz's Avatar
    Join Date: Sep 2002
    Location: USA
    Search Comp PM
    Sound Forge is listed at $375US.
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  5. Member
    Join Date: Jul 2010
    Location: UK
    Search PM
    Yes, not cheap.

    It looks like Audacity has a similar, though simpler, tool: Effect->Equalization

    You can click and drag the line in the frequency graph to lower the volume at specific frequencies. Just experiment until you hit the frequency of the buzz. But try the Noise Removal tool that redwudz suggested first. That may be enough on its own.

    Tutorial: http://www.guidesandtutorials.com/audacity-effects2.html
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  6. Video Restorer lordsmurf's Avatar
    Join Date: Jun 2003
    Location: dFAQ.us/lordsmurf
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    There's quite a few threads on this topic at http://www.digitalFAQ.com/forum/forumdisplay.php/restore-filter-improve-17.html
    and software use ranges from DC Forensics ($$$$) to Sound Forge ($$$) to Goldwave ($$) to Audacity ($0).

    The method you can use depends on severity. Samples required.
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