Hi,

If you want precise answer you should add to your question which version of Magix Music maker you are using.

If you mean to import audio change tempo key and burn on CD then it is possible.

You can import audio/track by using File manager then drag and drop the desired audio on Magix arranger.

If you are using music maker 16 premium you can check pdf page 70
for detail about audio objects.

In general, MAGIX Music Maker 16 Premium automatically adjusts
audio files to the arrangement tempo. In normal cases, you won't
need to worry about the different tempo of audio files and Soundpool
samples, since these are automatically matched.

If you want to combine audio material you have recorded yourself
from different sources, samples from Soundpools, or songs from CD
with each other, then you will often need to adjust the tempo or pitch
of audio objects to match each other. There's an automatic function
which automatically adjusts the tempo of audio objects when they are
loaded to the arrangement's tempo, plus advanced tools like the
Remix Agent and the Loop Finder

Menu effects -> Audio -> Loop Finder

Feel free to contact.

Thank you
nihon94