How to get good quality digital audio: mp3, flac, m4a?
How digital audio works
We all know that sound propagates in the air through waves, which are generated from the vibration of some object.
When these vibrations are constant, musical sounds are produced. When they are disordered and without harmonics, they can be considered noise.
Constant vibrations, like the note A of a piano that comes from 440 vibrations per second, are audible and distinguishable for the human being.
Because the human ear has its peculiarities and limitations, for example:
-It can only perceive between 20hz and 20khz
So notes that come out of that range are indistinguishable, I don’t perceive them, there is no point spending minimal disk space on these vibrations that the human ear cannot hear.
In order to detect and save these notes to a file we need a sample rate of 44100 per second.
There we have the first element that will allow us to have a good sound quality.
The second will be the amount of bits that can be heard per second, this amount determines how many details can be perceived and there we find that a bitrate greater than 192 kbps should be used and preferably reach 320.
This is the second and crucial element to having quality audio, even if it is an mp3, that will sound CD quality.
It is important to note that these numbers must originate from the original. In other words, if we take an mp3 that has 96 kbps or 22050, it will be useless to convert it to 320 or 44100, because what was discarded is not recoverable.
Mp4Gain is a normalizer and converter that works perfectly to achieve this sound quality.
