Pin It

Cleaning A Voice Track With Audacity

Cleaning A Voice Track With Audacity

Audacity LogoOne of the best ways to improve your home videos whether they are of family events, outings, or even videos you are making for online consumption is in the area of audio.

There is an old saying that the most important part of video is audio and in this case you can make your videos more watchable by making them more… listenable! (OK! I know that’s not really a word!)

Quite often when you are looking at other peoples videos you may have noticed that although the video itself seemed quite OK, there was something that seemed to be annoying about it or some way that it was failing to hold your attention.

More often than not it is actually the audio quality that is having that effect.

On this page I have laid out a simple procedure anyone can follow to quickly and efficiently clean up a narration or voice over track.

The techniques apply to any voice recording you have done regardless of the source but before that always remember when you are recording a voice to set your device at the highest possible quality of recording.

Some devices don’t offer this but many do, so take the time to go into the settings of whatever you are using to make sure you are getting the best audio quality you can.

Once you have your recording we are going to use a free audio editing software program to polish the sound file you have, so we need to get that file isolated and into a format suitable for editing.

If you have recorded a voice track on your computer this is simple because you will already have a single audio file and most likely it will be in the .wav format that we need.

If you have used some other kind of system and do not have a .wav file then you can get a free audio converter here that will do the job, or just Google for one.

The point is that we need to get the file into the .wav format to get the best results.

Because we are going to edit the file and are also going to be adding that file back to a video project it is very important to stick to the .wav format.

If you are dealing with a voice track from one of your existing videos simply load the video into your video editing software then go to the output – sharing – distribute part of the program and choose to output the file as a .wav audio file.

One you have the sound file you will need another free software program called Audacity which you can download for free here: Download Audacity.

Just choose the version suitable for your system and install.

Now that we have Audacity installed, open the program and load your audio file by selecting “File” then “Open” and navigating to where you put the audio file.

Audacity Step 1
Audacity Step 2

Audacity will give you the option of either directly editing the original file (faster) or making a copy of the file and editing the copy (safer). My choice in this is to manually make a copy before I even start and place it in a separate folder.

Audacity Step 3

That way I always have the original to go back to if I mess up and I am not getting Audacity to do anything extra that could lead to problems.

One more point to note before we get into the procedure is that Audacity is an incredible sound editing platform. Although this simple guide will get your voice tracks up to speed it in no way taps into the vast capabilities of the program.

It would be worth anyones time to delve further into learning how to effectively use Audacity for all parts of your video sound tracks.

Cleaning Up Your Voice Track

Once you have chosen the method of editing, the file will load into the program and be displayed as a waveform representing the sounds within the file.

Audacity Step 4

Noise Removal

Before we start we need to find a small section of the voice track that has no vocals recorded on it. We will use this section of the track to give Audacity a sample of the noise we want to remove.

In the example track I have used the mouse to select a portion of the file.

Audacity Step 5

Now select Effect then Noise Removal and a dialogue box will open.

Audacity Step 6

Click on Get Noise Profile and Audacity will capture and analyze the small sample you selected in the previous step.

Audacity Step 7

The dialogue box will disappear and you will be back at the waveform view of your file.

Click anywhere on the waveform then either hit ctrl + A or use Edit / Select All to make sure the entire file is selected.

Now go back and select Effect, Noise Removal again and the same dialogue box will open only this time check the bottom of the box to see that (1.) Remove Noise is checked then hit OK.

Audacity Step 8

Although there are lots of ways to adjust and fine tune this module remember, we are going for a quick and dirty fix here!

It will immediately run and you will notice that the areas where there were no vocals before have now become much thinner indicating the reduction in noise.

Audacity Step 9


First of all make sure the entire audio clip is selected by using ctrl + A or by using the Select All function under the Edit tab.

Go to Effect then select Equalization.

Audacity Step 10

A new dialogue box will open shown below. Make sure that Draw Curves is selected and then from the drop down box select EMI 78 as the profile you want.

You can use the preview button to listen to the change it will make if you like. Finally select OK and Audacity will apply the changes.

Audacity Step 11

What you may notice is that the small areas where you removed noise have now kind of fattened up a little because of the Eq changes.

Audacity Step 12

Take a listen to the final product and if it is ok then… OK!

If the Eq has raised the noise level to a noticable degree then re-do the noise removal step once more for final clean and you should be done.

45 comments to Cleaning A Voice Track With Audacity

  • russell

    Thanks for sharing this information! It’s very helpful..

  • jawwad

    i have an audio file….about 50 years back around 1972…….. there is noise + voice of speaker is also not clear …… how to fix ?
    i am naive user of audacity.

    • Lance Carr

      Hi Jawwad,
      Unfortunately cleaning up something like that is very complicated and difficult to do.

      It is a specialized action and to be honest I am not that experienced in the field of specialized audio.

      Try the Audacity forum and maybe someone there can help.

  • Patricia

    Hello Lance,
    Thanks for the great tutorial. I edit my own radio show that I download from the stations archives. It’s hours of work because I only know a few things. This should really help.

    My question is, can I separate the host from the guest. Say, I’m too loud. Can I separate myself all at once and lower my volume. Right now I do it piecemeal and it take forever.


    • Lance Carr

      Hi Patricia,
      The only hope you have of achieving that is if the host and the guest have been recorded on separate tracks originally.

      I am guessing they weren’t!

      So sadly I think you are doomed to sitting there endlessly twiddling the volume settings!



  • MK

    Thanks, it worked like magic! Although I don’t know what the EMI 78 does exactly.

    In my copy of Audacity(os x) there is no “remove” and “isolate” options. There is “Reduce” and “Residue” and the Effect is called “Noise Reduction” not “Noise Removal”

    • Lance Carr

      Hi MK,
      I guess the names of entries may be a little different on the Mac version.

      The EMI 78 filter is basically a filter I use to enhance the sound of the voice a little. It kind of gives it that “radio announcer” feel.

      It’s not essential and there are a bunch of other settings you can play around with to give your voice a richer tone.

Leave a Reply

You can use these HTML tags

<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>