Maschine reborn: Step up to Maschine 2.0 software

How do I mix two or more audio files, for instance, one made from recording the instrumentals and the other made from recording the vocals, which I have sung while listening to the instrumentals file playing though my headphones so that my microphone did not pick up any of the instrumentals while I sang along to those same instrumentals, into a third, mix audio file? For instance, first, I record the instrumentals and save that instrumentals audio file. Then, I play back that instrumentals audio file through my headphones and, at the same time, I sing along to that same instrumentals audio file playing through my headphones and both record and save that new vocals-audio file. At that point, I have two files, one the instrumentals file and the other the vocals file. How do I sync-play both of those same two files exactly together at the exact same time and from that same sync-play, make an audio-mix file, which I then save as my vocals-instrumentals audio-mix file?