Normalize the audio of a video Today, we return to the Mp4Gain to see the concept of normalization of the sound. Do you wonder what it is? Have you ever noticed the difference in sound level between certain scenes in the same movie?
Imagine that you are watching the latest Michael Bay movie: there are explosions everywhere. Suddenly, you are faced with a calm and quiet scene (Michael Bay? Really?) And you no longer listen to the dialogues. Suddenly, they frantically increase the sound. Unfortunately for you, a few seconds later, a new explosion arrives (Michael Bay anyway) and you just lost a good part of your hearing. If you are fed up with these sound level variations in movies, I advise you to read this article, because we will see how to normalize the sound of your video using Mp4Gain.
What is sound normalization?
As always, let’s start by defining the important terms of the article. According to Wikipedia:
Audio normalization is a process of increasing or decreasing the amplitude (volume) of an audio recording in a constant relationship throughout the duration of the recording, so that the maximum amplitude or maximum effective value or volume perceived (volume)) reaches a predefined level, the standard. If the signal has multiple tracks, they all undergo the same correction.
More or less, sound normalization involves processing the volume on the audio tracks. In the context of a movie, we will take a given sound level (the normal) and limit the sound deviations from this normal.
The goal is to have a much less noticeable difference. I assure you immediately, we are not trying to give the film a constant volume. A whispering scene will always be less powerful than an explosion. We will maintain the movie’s sound dynamics effect while limiting it to its highs and lows. Basically we’re going to make weak scenes a little bit more powerful and powerful scenes a little bit weaker.
I will try to explain this to you simply. Imagine your movie whose sound level varies from 1 to 100. We will choose the normal to the average by 50 and multiply each sound level so that they now vary between 25 and 75. Therefore, our minimum level will now be 25 instead of 1 and the maximum level will be 75 instead of 100. We increase the minimum and decrease the maximum while maintaining the proportions between each sound level: therefore, we recalculate each new sound level. For example, the level that corresponded to 80 will now be 60 and the level that corresponded to 20 will now be 40.
Through normalization or dynamic compression, you no longer have to touch your remote. Turn up the sound to the desired level, turn on normalization, and put your sound remote in, because you won’t need it anymore. Also, if you have neighbors, trust me, they will thank you.
Activate sound normalization using Mp4Gain
So here we are again in front of this wonderful software to see how to use this essential option that is sound normalization. .
Normalize Audio from a Video
It is done! Please note that after confirming, your video’s overall volume may increase, this is completely normal, normalization works.
Now you can enjoy your movies and their 2.1, 5.1, 7.1 and much more without disturbing the whole neighborhood. You see it was extremely simple.
Mp4Gain Activates dynamic range compression.
It’s a bit like a compressor effect for those who know a little bit about audio (be careful not to confuse it with audio compression like mp3, it has nothing to do with it).
In short, it is not exactly the same mathematical method as behind normalization, but the objective is similar and the result is just as good.
Dynamic compression using Mp4Gain
With this modern algorithm you will be able to listen to the whole song or the whole video without the lowest levels falling below a predetermined level and without the bad levels exceeding a certain predetermined level. With what is achieved the pleasant situation of listening to everything and listening to it at a good level of volume, neither too high nor too low.
