Hi,

First when I saw your question I thought to answer but the problem is you did not mention if you use Magix Music Maker 15, 16 or 16 Premium. Because the mic connection is no problem you just connect to your computer but for other instruments do you mean
Midi
Keyboard
Guitar
Piano or something else.

It would better if you could add more information in detail so, other people could answer you too.

Thank you
nihon94