What determines the quality of an mp3?
How do you get a high quality mp3?
This question could have two different approaches:
1.- An existing mp3 has a certain quality and one could wonder what determined that quality
2.- We are going to encode an mp3 from a video from which we will extract the audio and how will we get that new mp3 to have the highest possible audio quality?
In this case we will focus on option 2, how to create a video from original audio and make it have good audio quality.
The first step, inevitably, comes from getting original audio that is of high quality. If we do not start from that point, we will no longer achieve our goal.
The quality of the audio is very difficult to “restore” if you do not have as a starting point an original audio that will have a high quality.
But even if you do have that high quality original source, it’s important against using advanced software like Mp4Gain and taking the right steps to make sure you don’t lose that quality by making a bad decision when extracting and encoding the audio a long time ago. mp3, a flac, etc.
In order to convert or extract an audio from a video, it is important to understand what points are decisive:
-Bit rate. No, to save space, we will use a bitrate lower than 192 and if possible we will use 320.
Nor does it mean that if we have a 128 mp3 and convert it to 320 we will be able to restore its quality.
What it means is that if we originally convert to a 320 mp3, we will discard very little information and thus we will get a very high quality mp3. Virtually indistinguishable from a CD.
-The following will be to use a samplerate of 48000 or at least 44100, not a smaller one.
In order to capture the full range audible by the human ear, it is necessary to use at least 44100.
Mp4Gain is the right normalizer/converter for the job and to give you a high quality output.
