THX was developed by Tomlinson Holman at George Lucas ' company , Lucasfilm , in 1983 to ensure that the soundtrack for the third `` Star Wars '' film , `` Return of the Jedi '' , would be accurately reproduced in the best venues .
THX was developed by Tomlinson Holman at George Lucas 's company Lucasfilm in 1982 to ensure that the soundtrack for the third `` Star Wars '' movie , `` Return of the Jedi '' , would be accurately reproduced in the best venues .