Under the 'stereo mix' device's 'Listen' tab, check the 'Listen to this device' box and 'Ok' out. In the 'recording devices' area, make sure 'show disabled devices' is checked and the enable the 'stereo mix'. If you can't do something like this on your system, you may have to set your sound mode to 'Stereo' when using the Magix Music Maker under your sound options 'playback devices' in Windows. I still had to switch the sound mode to stereo for the analog output in 'playback devices' sound settings. Fortunately, with my Tiamat 7.1 (analog) headphones, I was able to run the analog output from the Tiamat's control device to the analog input of the control device in my Companion 5 USB speaker system. I couldn't run the sound through the USB speaker system. I have the same issue with Rocksmith 2014.
Overall, My head phones are working with anything else than Magix Music Maker. Alright, so I have a headphone which is properly working with games,music,videos and all but the problem is that headphones aren't able to output the sound of a software named '' Magix Music Maker ''.