I listened to the Audio cues of the DVDs and BDs too much.
Where did you find that scan? Is it HD?
With ac3 coding it might be the original sources Audio encoded… Because it is easy to find the CDs mix as DTS from the japanese DVD these days… If the Audio was scannend/encoded from the Films optical audio, you might notice some analoge no is, like scratches… (except, if the Audio on the Film was kept flawless.)