Sorry most do not understand how I do not have an answer to a simple case
I Have mp3A + mp3B + mp3C
I want to separate into three files mp3A / mp3B and mp3C
It should be simple but i can not figure out
You didn't indicate which flavour of MMM that you have - basic or Premium.
"In the Premium version, you can use the integrated CD mastering and burn program to do this. Click on "File" and select the "Export project -> Burn audio CD-R(W)" option to export your project. The project will be loaded into the CD mastering program MAGIX Music Editor and can be burned straight to disc from there." Well, almost, you still have to set up the song names and ID3 information in Music Editor 3.
In the basic version, you have to use a range and export each song individually. Look carefully at the export screen and you will see these instructions. Look up range in the manual if you don't know how to set a range.