a DJing System?

Back in the days there was a game called Coke Music where the user could create a song from their in-game music creator and then Play it for a Room of people where they get points from a Thumbs Up/Thumbs Down system. I was wondering if theres any way I can recreate that with UE, and if so, is there way of doing it by importing peoples actual music instead of an in-game music creator?

Yes you can import audio or video into UE4. See the media framework stuff