Today an easy tip how to quickly reduce or completely remove noise in Adobe Audition.
This method may not be the best solution if you work professionally with audio but it is quick and easy and I think that for many people that produce digital content (podcasts, Youtube videos and so on) is good enough.
I use it myself all the time both for my personal finance podcasts at Smart Polak and also when producing Audiobooks for learning Polish. It virtually takes seconds and produces good results. Here is what to do.
How to reduce noise in Adobe Audition in 3 steps
#1 Record the voice and the background noise
I use older version of Adobe Audition CS5 but I am sure it is going to be exactly the same in Adobe Audition CS6 and CC.
I assume that you are producing your own audio because in this method you actually need to have noise sample. This is usually some background noise when recording audio, for instance noise from the fans of your computer, street noise, and so on.
When recording sound in Adobe Audition after you stopped talking do not immediately hit the stop button. Be silent and let the recording carry on for couple of more seconds. During this time you will record the background noise and will be able to use its sample. Now press the stop button.
The sound wave should look similar to this, the arrow points to the background noise (you can see that the line is not flat and that there is some noise there).
#2 Capture noise print
The next step is to capture the noise print. Basically, to get rid of the noise you need to let the software know what it is. To do so, you mark the noise you recorded by clicking and dragging your mouse. Then you can either press Shift + P or right-click and choose from the menu Capture Noise Print (alternative you can use top menu and go to Effects/Noise Reduction-Restoration/Capture Noise Print). Here is the screenshot of how it could look:
#3 Run noise reduction process
Now press Ctr+A on your keyboard to mark the whole sound track. From the top menu choose Effect/Noise Reduction-Restoration/Noise Reduction (process). Alternatively you can press Shift+Ctr+P from your keyboard. You should see a new window with additional options:
You can play with these options changing percentage of noise reduction you want to achieve and changing how many dBs you want to reduce the noise. You can also click on “Advanced” for even more options. I find that the default values (100% and 40dB) give good results. Once you are happy with all the options, click the Apply button. Depending on the length of your file, this process should take anything between a few seconds up to a minute. When the noise reduction has been applied my sound wave looked like this (as you can see the noise has disappeared and the line is now flat):
In your case as well the line of the previous noise should be flat. It is also a good idea to listen again to the recording and to make sure that the voice has not been altered too much by the process. If something went wrong, press Ctr+Z on the keyboard to undo the change. Alter the value of the Noise reduction process and try again.
Once you are happy with the results, do not forget to delete the area of the previous noise (if don’t, your recording will include a few silent seconds at the end). That is all, you have now a file without the noise and are ready to enhance it further (more about it in my future tutorials.)
I hope you now know how to quickly remove noise from your recordings in Adobe Auditions. Feel free to leave the comments below if you have any questions.