How to do Noise Reduction on your Audio with Adobe Audition

When I first started working on Short Films, Though I was capturing High Quality and Professional looking Footage’s but my Audio turned out to be really bad since I had no additional sound recording device and the camera’s in built audio recorder is the only source of capturing the audio.

When I set about editing the movie, I discovered lots of humming and wind sound in the audio which was destroying the overall experience of watching the film.

So, I decided to pass my entire audio through a Noise Reduction process using Adobe Audition. It is a software that has several features for audio solutions. Audition is an easy to understand and very easy to use software.

In this tutorial you will learn the basic steps to do noise reduction on a audio sample using Adobe Audition.

  1. Start up Audition, drag and drop the audio file you want to process with the Noise Reduction into the File Panel as shown in the image below. You can also go into File > Open and select the Audio file you want to work with.
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  2. Once you import your audio file, you will see the Waveform of your audio in your project timeline.
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  3. Now, use the timeline slider to enlarge the view of your waveform, you can do so by holding one corner of the timeline and dragging it inwards. Notice the Minimum waves in your audio. These waves are basically all the other distortion sounds which we need to remove from our audio.
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  4. Using your mouse, select a small amount of those minimum waves as shown in the image below. You can use the play button to play the selected duration of audio to make sure it is the unwanted audio only. You will hear a humming sound, something like SHHHHH.
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  5. Now go into Effects > Noise Reduction / Restoration > Noise reduction (Process) or you can also use the Keyboard Shortcut key CTRL+SHIFT+P.
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  6. This will open the Noise Reduction settings panel, Click on Capture Noise Print button, this will analyse and store that particular audio data. You can use the Noise Reduction slider to control the amount of reduction you want to do. After that, click OK, this will apply the Noise Reduction filter in that particular part of audio which we have selected in Step 4.
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  7. Our aim is to apply the filter on the entire audio, so press CTRL+A on your Keyboard, this will select the entire audio clip. The timeline will turn white once selected. Notice the area circled with Red, it the part of the timeline which is already processed with Noise Reduction.
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  8. We will use the earlier captured noise print data to do Noise Reduction on the overall audio. Once again, go into Effects > Noise Reduction / Restoration > Noise reduction (Process). This time simply click on the Apply button as we have already captured the noise print which we want to remove.
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  9. As you click on the Apply button, your entire audio clip will be processed with the Noise Reduction Filer and all the unwanted humming and distortion sound will be removed.
  10. To save the processed audio click, simply go into File > Save as and render out your audio.

Sometimes, while applying this process, you can hear some digital type of sound effects in your final processed audio, to eliminate such error you can use the Noise Reduction slider to control the percentage of Noise Reduction. I recommend keeping the slider at about 75-80% so that you don’t get any flaws in your final Noise Reduced Audio file.