Welcome to DJ Mixer! Press the red buttons to play the songs labeled on them. Adjust the volume of everything with the Overall Volume slider. Press the gray buttons at the bottom to play drum beats and music loops. If you play two or more songs at once, you can adjust the volume of the first 2 songs you picked with the Song 1 and 2 Volume sliders. Press the blue Stop All Sounds button to stop all the sounds. I recommend using full screen.
Credit to @cutev