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Thread: Editing an audio file in Audacity

  1. #1
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    Question Editing an audio file in Audacity

    Hello,

    I have some very long audio files, some 12 hours long, that I need to edit in audacity; and the instructions are not clear about how to mark the area I want to keep, with the cursor.

    It seems I can only move the cursor at the normal rate; and this is completely useless for a file that is 12 hours long.

    Can anyone give me the scoop on how I can do this efficiently?

    Thanks Hannibal
    I love it when a plan comes together. It keeps me "on the jazz."

    Ubuntu 12.04 & Windows 7 on Dell Inspiron 5520 Quad-Core
    dual-boot system. 'Kill Bill!'

  2. #2
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    Re: Editing an audio file in Audacity

    You should be able to drag with the mouse to define the section of a project you want to retain - same as selecting text. Then trim the rest off. I don't see here any limitations on the speed of dragging the mouse. The tooltip should help you find the trim button on the toolbar.

  3. #3
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    Re: Editing an audio file in Audacity

    A bit more...
    If you want to cut out a section of the audio to use: select with mouse, listen, drag and adust the endpoints, listen again until you get it right. Then copy. Then, Open a new file (File >Open) and then paste. You can normalize you selection for optimum volume. Or incorporate other effects as needed (such as fade in and fade out). When done, export to a file name and format of your choice. You really need to study the manual to get all the options.

  4. #4
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    Re: Editing an audio file in Audacity

    Use sox to cut the file into 2-hour pieces and then edit those. Audacity slows down with files longer than 2-hours due to the way it stripes the data over several files. You would need huge RAM and 8-core processor to get audacity to perform with those files. Even then, I don't think it is really the best tool for handling files that long. You could set up audacity to run its project files from a RAMdisk and that would speed it up significantly. But I agree, zooming into a file that large is a pain.
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  5. #5
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    Post Re: Editing an audio file in Audacity

    Quote Originally Posted by Dennis N View Post
    A bit more...
    If you want to cut out a section of the audio to use: select with mouse, listen, drag and adust the endpoints, listen again until you get it right. Then copy. Then, Open a new file (File >Open) and then paste. You can normalize you selection for optimum volume. Or incorporate other effects as needed (such as fade in and fade out). When done, export to a file name and format of your choice. You really need to study the manual to get all the options.
    How do I set the endpoints; since it appears I can't FF the cursor?

    Thanks Hannibal
    I love it when a plan comes together. It keeps me "on the jazz."

    Ubuntu 12.04 & Windows 7 on Dell Inspiron 5520 Quad-Core
    dual-boot system. 'Kill Bill!'

  6. #6
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    Re: Editing an audio file in Audacity

    Try a smaller file. I think the file is just too big for audacity and it's zoom tool. Sometimes the keyboard shortcuts work better, but moving around a large file in audacity is a pain.
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