The conversion of the file MP3 to M4P will allow you to edit a file using other software than before. The conversion MP3 to M4P is particularly helpful in cases where you want to give certain features to the data in the MP3 file, and all the programs that support the MP3 format do not have the possibility to introduce the desired changes.
Just download one of the programs from the list and install it on your computer. After starting the program, select MP3 file that you want to convert. Then select the target format (in this case M4P) and follow the instructions. Save the converted M4P file in the selected location. From this moment you can open the M4P file with all the programs that you will find here.