MP3 All in one is a very useful application that allows you to edit your music files. More specifically, it allows you to cut and isolate the best spots from your songs and use them as ringtones or for any other purpose. It also lets you record audio, open the tag editor from the main menu, and edit the tags of your music files and customize them. accordingly. This feature gives you an advanced – professional feature. It also lets you mix two songs that you can select from your music collection, and finally lets you merge two music files into one. You simply select the songs you want to merge and with the touch of a button all the songs will merge in no time.