Eliminating hum on a recording

Discussion in 'Amateur Video Production' started by flyn, Jan 20, 2006.

  1. flyn

    flyn Guest

    Hi,
    I have a recording of a meeting that I attended but it's difficult to
    make out some of what was said due to a relatively loud constant hum on
    the recording. How can I eleiminate the hum to make the speech audible?

    I could supply a clip of the soundtrack as a wav file if that would
    help. I'm also looking for a freeware or shareware program that would
    enable me to filter out the hum.

    Any ideas anyone?

    Flyn.
     
    flyn, Jan 20, 2006
    #1
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  2. "flyn" wrote ...
    > I have a recording of a meeting that I attended but it's difficult to
    > make out some of what was said due to a relatively loud constant hum
    > on
    > the recording. How can I eleiminate the hum to make the speech
    > audible?
    >
    > I could supply a clip of the soundtrack as a wav file if that would
    > help. I'm also looking for a freeware or shareware program that would
    > enable me to filter out the hum.
    >
    > Any ideas anyone?


    You can use a freware software like Audacity or a
    cheapware software like GoldWave, or any number
    of high-end software to do this. Some applications
    (like Adobe Audition which I use) have preset filter
    settings for doing this. Note that you may have more
    than just the "fundamental" frequency (50Hz or 60hz
    depending on where you live). You may very well
    also have several "harmonics" (multiples) of the line/
    mains frequency (50-100-150-200Hz or 60-120-180-
    240Hz, etc.)

    Of course, it is always more desirable to eliminate hum
    (and particularly other types of noise) while recording
    rather than trying to remove them after the fact.
     
    Richard Crowley, Jan 20, 2006
    #2
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  3. flyn

    Guest

    got to www.goldwave.com and download the shareware goldwave.

    after you install the app, open the file with the hum, select a small
    portion with just the hum,(left mouse button sets the left side, right
    button sets the right end of the selection) and copy that to the
    clipboard. Now select the entire clip again, go to the effects drop
    down menu, select filters, and noise reduction. Use the clipboard as
    the reduction envelope.

    That should make the meeting audible for you.


    flyn wrote:
    > Hi,
    > I have a recording of a meeting that I attended but it's difficult to
    > make out some of what was said due to a relatively loud constant hum on
    > the recording. How can I eleiminate the hum to make the speech audible?
    >
    > I could supply a clip of the soundtrack as a wav file if that would
    > help. I'm also looking for a freeware or shareware program that would
    > enable me to filter out the hum.
    >
    > Any ideas anyone?
    >
    > Flyn.
     
    , Jan 20, 2006
    #3
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