Remixing
In remixing, a person (often a recording engineer or record producer or lyrics producer) takes a familiar song, splits it into different parts called tracks, and changes the song's music, instruments, layout, and or vocals to create a new version of the same song. It is called remixing due to mixing being the putting together of all the parts of a song, and remixing being the putting together of the parts of the song differently than the original.