Normalize is a freeware audio compressor that you can use for free. The program allows you to normalize any audio file or track, whether it was recorded using Audacity or not. Why would you want to normalize a file? Because it will reduce the noise and low frequencies of a track, which makes it easier to hear and more conducive to listen to. This is the main benefit of normalizing an audio file - you'll get rid of the "noise" and let the music have a better quality.
So how does normalize work? It works similar to other audio programs in that when you're in the editing phase of a recording, you can click on the arrow keys and on the R key to render the track into a buffer. Once the file has been rendered in the buffer, you can then normalize it by clicking on the envelope button and on the left or right keys of the keyboard. Once you've rendered the file, you can then go to the noise control section of the audio mixer. There, you will find a number of sliders which allow you to adjust the level and type of noise.
I'd like to go over a couple of normalizing options in detail here. Firstly, there is the whole process of noise addition. With this option, you add more noise to the incoming audio file. Basically, this option makes your audio sound boomy and clunky - it also adds an abundance of low frequency and high pitched sounds. This makes your audio extremely heavy and dull.
What Does Normalize Do in Adobe Audacity?
But what does normalize do in the sense that it actually adds some quality to your audio file? Basically, when you render a track with normalizing, the resulting audio will have a quality of sound where the low frequencies and high frequencies are nicely balanced. This allows your track to have a more listenable sound to those listening to it. It is therefore commonly used as a mastering effect on music tracks.
If you are wondering what normalize does in the context of lossy compression, you need to understand what happens with this effect. When you render a track with normalizing, you are in effect compressing your audio data into a smaller file. This means that there will be less information in your track for any given spectrum. Due to the smaller file size, your file will likely have a lower quality; however, this doesn't mean that it will be unable to play properly on your computer. Due to the fact that your computer has no concept of the difference between the various frequencies present in your file, it will treat every bit of data as a separate frequency.
What does normalize do here is that it instructs Audacity to treat each track as a different frequency. Every time you render a track, the audio data gets compressed and the resulting file will have fewer frequency channels. In this way, a compressor with an appropriate amount of bandwidth will generate a lower quality file. As such, it is imperative that you only use lossy compression when you need to ensure that your audio files won't have too many channels. For example, if you have a voiceover that contains a number of different locations, then you would probably be better off using something like a WAV compressor rather than a lossless format like MP3. However, if you are merely trying to reduce the file size of a short recording, then a lossless format may well be okay for the job.
It is important to understand that normalizing does not only apply to audio recording and compression. There are other instances where it is applicable, such as video editing and so on. The same principle applies here: you would be advised not to normalize a DVD video or a film that contains scenes of blood and violence for example. However, some softwares like Windows Movie Maker do have the facility to apply normalizing automatically, so you might try using one of these tools if you want to make your videos look as good as possible.
So, what does normalize do in Adobe Audacity? Well, it compresses the file to decrease the file size and improve its bandwidth. However, you must always use a program such as Windows Movie Maker to normalize any audio file you create - this will ensure that the resulting file is of the highest quality. In the same way, you should only use a lossless format when you are creating a video - this will ensure that your video will load faster. This will also ensure that you get the best results when your compression attempt is effective.
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