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How to normalize mp3 files to play at the same volume

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How to normalize mp3 files to play at the same volume

What could we understand by normalizing the audio volume level of an mp3 file or any other format?

Mp4Gain : Mp3Gain alternative : Audio converter Video Converter ...

A very technical definition would be to say that what is sought is to ensure that the upper volume level or the volume peaks of a song do not exceed certain levels.

That would be the answer that many people would give, but that would take us 20 years ago. When the normalizers were very simple and basic.

Today the technical explanation would be much more advanced and it would be something like this:

What a modern normalizer seeks is to ensure that the points with the highest volume level, also known as “peaks”, do not exceed a certain level, but at the same time they must not be below another level X.
In other words, the volume peaks of an audio file must not be outside a parameter, nor higher than one level X, but also not lower than another level X1. Which means that the peaks of a song will be very close to those of the other songs, with which we achieve that the sonority or loudness is very similar.

And if we are going to think about an even more efficient normalizing program, we could think that the lowest levels will not be outside of the x2 and x3 range either.

So we should never have to turn the volume knob to raise or lower the highest volume peaks of a song … nor should we turn the knob to raise parts of a song that sound very low.

In summary, the song (actually, all songs) will sound within a volume range, without falling below a certain level or rising from another level. What will make the activity of listening to music pleasant.

This is only achieved by Mp4Gain, which is also capable of doing all the important audio and video formats.

How to normalize mp3 files to play at the same volume? We hope that the brief explanation given above has been sufficient to achieve an adequate response.
And that helps to understand why some normalizers are definitely superior to others and more modern and efficient.

Because many people only think of volume peaks when thinking about a normalizer, but “sounding at the same volume” also implies that the lower volume parts are similar among all mp3s.

High and low volume parts will have similar levels.

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Want to increase the volume of your mp3s?

How to increase, decrease or normalize the volume of mp3 songs?

volume increase

It often happens that you hear a song on your computer and listen to it more than well, then you will be disappointed when you listen to it on your mp3 player or set it on your mobile phone as a ringtone.

In less than a minute, you can increase the volume of one or more songs at the same time and be able to test each time the decibel increases so as not to compromise the quality of your song and create distortions.

Increase volume

In addition, Mp4Gain allows normalization of the volume of multiple songs, that is, to level the volume of all mp3s, this feature was very useful in the car, on long trips when listening to many mp3s with different volumes, and as I should be time to adjust the volume, which affects my concentration behind the wheel.

Mp4Gain also allows other very useful customizations, such as various effects including fade at the beginning or end of the song, useful when we add an audio base to the video we create, or maybe we want to download on Youtube to prevent a song from starting immediately with maximum volume or it ends abruptly

In my opinion, Mp4Gain is the best for its interface, simplicity and ease of use. In addition to changing the volume of your songs, it offers a variety of other useful and user-friendly features.
So I remind you that once installed, it works on your mp3 or audio and / or video files of the most popular formats, and once it has the desired result, you only need to enjoy the normalization of the volume that Mp4Gain performed.

Normalize the volume gain of an audio or video file

During the first years of the appearance of mp3s, a constant problem, which had no solution, were the ups and downs in the volume of mp3 files. There were ups and downs in the volume level of each song.
It was essential to turn the volume knob to manually level the volume.

There was no solution to the problem of leveling the volume gain of each mp3, to make the sonosrity of each mp3 file similar to the others.

Soon some ideas emerged, mostly based on looking for the peak of each song, to naively seek to increase the loudness or volume of that mp3, amplifying the mp3 until the peak reached its maximum possible level, without distorting.

Because in music, if the maximum volume level is exceeded, distortion occurs. And if we have looked for the high sound quality, it would be absurd for us to destroy that quality by introducing distorison in our attempt to level the volume of each mp3.

But this method of analyzing each fragment of the mp3, looking for the volume peaks, to then be able to calculate how much the song could be amplified so that that peak reaches its highest possible level, without reaching distortion, it did not get all the mp3s They will sound like that. What was intended was to improve the level of loudness, the level of gain and match them between the different mp3s.

That’s how ideas mature, like the Replay Gain. Where the well-known Mp3Gain came from.

But research and experimentation continued and soon similar paths followed those used in recording studios. A mixture of limiters, compressors, etc. that achieved a better result by matching the volume levels of an mp3.

As the normalization algorithms were improving, audio formats began to be added. Looseless formats emerged and gained poipularity. And then it was no longer enough to normalize mp3s. Now it was necessary to normalize the volume gain level of many audio formats: ogg, flacc, acc, mp3, m4a, etc.

And soon, with the popularity of the video, it was also necessary to match the volume levels of the videos. Normalize videos became a daily necessity.

This is how Mp4Gain offers the possibility to normalize the audio of audio files and video files, in all the most popular formats.

Normalize audio: Normalization and normalizer

Normalization – Normalize audio

Normalization is an atypical dynamic process, very different from compression, limitation, expansion or noise reduction:

It does not reduce the relative dynamic range of the audio signal.
It is not applied in “real time”, or at the moment, but it is a process that is carried out “a posteriori”, on the previously recorded material.
The normalizer is a device that falls into the category of dynamics processors.

Analyze the target signal, detect its highest volume peak and increase its gain to the maximum level possible without distorting.
With the same proportion the level of the rest of the signal increases.
The signal, in general, will sound with a greater volume.

It is very unpleasant to have a playlist with mp3 files playing at different volumes. However, it is possible to normalize (equalize) the volume of our mp3s.

Loudness normalizer

You can use the Loudness Normalizer to obtain a specific loudness.

Increasing the loudness to a specific value may cause clipping. To solve it, a peak limiter can be part of the process. The Loudness Normalizer increases the loudness and limits the peaks of the signal at the same time if necessary, to obtain the desired loudness.

This process takes place in several stages, first an analysis and then the final rendering.

What is an audio compressor?

When we talk about compression we also talk about dynamic range. Recall that the dynamic range is the difference in amplitude between the lowest and highest part of a signal. In the compression process, basically and technically it consists in decreasing the dynamic range of a signal.

These are the most common controls or points to control in an audio compressor:

Threshold: This is the point from which the compressor will start working. Any signal that exceeds this point will be compressed.

Ratio: This is the reason for the compression that will be applied to the signal that exceeds the threshold. We see it and find it as 2: 1, 4: 1, etc. The first number means the number of input decibels that exceed the threshold, and the second number the output decibels. In other words, for “X” number of decibels that exceed the threshold, “Y” number of decibels will be output.

Attack: It is the time it takes for the signal to compress after having exceeded the threshold. We see it and find it commonly expressed in milliseconds (ms).

Release: How soon the compressor stops working after the signal falls below the threshold.

Knee: This is a parameter that subtly modifies the compressor threshold. A low setting (Hard knee or 0) means that the compressor will act only from the set threshold. A high setting (Soft knee) will allow the compressor to act gradually from before the signal reaches the threshold. In this way, the threshold can be treated as a range and not as a specific point. As the signal approaches the threshold compression increases. When it exceeds it, it continues to increase until the entire compression ratio is applied.