Edit Video To Normalize Sound

Using specialized software to get the most out of a soundtrack.

There are many reasons why the soundtrack for a video may need to be edited. The sound may need volume adjustment or noise reduction processing for example. Video editing requires a video editing software. This software normally allows you to adjust soundtracks to fit the video on two separate tracks. It does not, however, have nearly as many processing functions as a full-fledged sound editor. A sound processing function such as normalization requires a specialized software that can process digital sound files. Normalization can increase, or decrease the gain applied to a sound file without clipping.

Instructions

1. Import the video into your video editing software. Drag the file to a timeline provided in the software’s project template window. Look to find both the video and sound on two separate tracks. Mute the video track so that when you play the file you can still hear the soundtrack but cannot see the video.

2. Make sure the sound level is not peaking or too low using the mixer. Do this by playing the entire track and watching the mixer indicators. Too much in the red means you have a distorted signal and should reduce the volume. Not enough means you should turn it up to strengthen the signal.

3. Use your cursor to select the audio track from beginning to end. Render this file as a sound file such as a WAV file and save. Now open your sound editing software and import the WAV file you have just rendered. Analyze the file in the editor and check for any clipping. Fix any such events as clipping can be detrimental to the normalization process by limiting the processing range.

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4. Use the normalization function to process the file. Adjust setting to “Peak Level” to use all the dynamic range available, then process by clicking “OK” and save. Open your video editing software. Load the video into the timeline. Mute the old soundtrack and open a new soundtrack. Import the normalized file and place it underneath the video. Once it is placed where it should be, you can render this file to a video format such as AVI or MPEG, with the new normalized soundtrack in place of the old.

5. Compare the results by listening to both new and old versions. Repeat these steps to separate and connect the soundtrack again for further editing. Use mastering tools or hire a professional sound engineer to master the soundtrack track for best results.