When everyone started using massively computers back in the 90s, also immediately they began downloading digital files for playback.
First is unloaded from the CDs themselves, extracting the files to the computer, programs who performed the grabbing.
Later he appeared Naptser and any other number of ways to download music files from the internet
Mp3 Volume Booster
But it was not advisable to use wav for its huge size, as the hard drives were small capacity files and download time on the Web tambein was huge, since the transfer rate was very low at that time, so the mp3 lived splendor.
But … download files from many different sources at once showed a problem: mp3 sounded different volume levels.
To correct arose many options, most very ingenuas, but worked well for that time.
But no longer they work for the present, because now we have many different choose, from phones, tablets, etc. to listen to digital music and ability in audio quality is much higher today.
Therefore, the best option is actualkmente Mp3Doctor PRO2, by using the most advanced technology, the quality suitable to be used at this time and with modern equipment.
Moreover, it not limited to mp3 but can normalize the volume of many formats, the most important.
In short, if it's getting louder mp3 (or any other format) with advanced quality, the option is Mp3Doctor PRO2.
Read: Mp3 Louder