This is a grey area re licensing - the App does allow you to share music you create and is advertised as so, however selling it is a different matter and is not allowed by the EULA - see section 6 here
Also see this post 5th answer down and Procyons summary 2nd post down.
I'm no copywrite lawyer, but I believe the question is not so much that you have used Music Maker to create your song, but exactly what tracks, loops, samples etc you have included. A recent posting suggests that some sources have options depending on whether the final product will be for your personal use or for profit. See here for reference to private or commercial licenses:
Hi Wolfgang, YES, you can sell tracks made with Music Maker Jam. For that you just have to buy the right professional and unlimited license on catooh (for all the content you have used in your song): http://www.catooh.com/us/sys/id/Katalog/area/8860/. This really makes sense, if you plan to earn more than about 10US$ per track (--> if you have used one loop package in that song).
Hi Wolfgang, YES, you can sell tracks made with Music Maker Jam. For that you just have to buy the right professional and unlimited license on catooh (for all the content you have used in your song): http://www.catooh.com/us/sys/id/Katalog/area/8860/. This really makes sense, if you plan to earn more than about 10US$ per track (--> if you have used one loop package in that song).
Thanks! Must I buy the license for each track new, or is valid for all tracks I make in future?
If you make a song with MM instruments and you intend to profit from the song financially I think you have to buy a commercial license for the instruments that are used in that song.
. . . . How about if I just use the instruments on Magix Music maker to make a song, do I need a license . . . .
A licence is not needed if you use the instruments and the song is your own composition, the only with the caveat that you must not use the default MIDI sequences that are created when you drag an instrument to the timeline.
Have you read the 2 topics at the top of the Audio forum?