 the version not updated was  the mono mix. Later on, a fifth audio mix was created (the fourth being  created for the 1985 VHS release) for the 1993 Definitive Collection  Laserdisc set. This audio mix combined elements from all three of the  theatrical audio mixes but was primarily sourced from the 70mm stereo mix.  The 1997 Special Edition and 2004 DVD release feature more changes (both  audio and visual). The 2006 DVD bonus disc is made from the masters for the  1993 Definitive Collection laserdisc set but with the highest quality 1977  print available spliced in for the original opening crawl. This means that  (excluding TV edits and pan & scan releases) there have been at least TEN  different versions of Star Wars to date.