Remixers, that is, people who remix, are musicians who use a variety of tools, primarily electronic, to create the new song versions. Remixing can be simply moving song parts around; it can also be creating new music for an old song lyric. There are two common kinds of remixing: production and mashups. Production remixing uses new instruments with the old song vocal, and mashups use two old songs mixed together to create a new song.