When the Lucasarts team was busy remastering the original Star Wars trilogy for the 2011 Blu-ray release, audio specialist Matthew Wood not only unearthed the original production rolls from 1976: "These were the rolls that were used for the original dialogue recording and the entire production recording that were done on the set," he told us.
"These [production rolls] had only been played once, the first time they were used they were transferred to magnetic film back in 1977 and that was cut. So I got to take them and retransfer them into the computer and with the highest-quality analogue to digital converters I could actually re-sync these back into the original picture. That is one thing that is new on the Blu-ray. It's amazing."