Info Wanted: 'A Nightmare On Elm Street' - Original Theatrical Audio question?

I was wondering… I’ve yet to see any preservations of original theatrical audio tracks from the Nightmare On Elm Street Films.   I know there’s a pretty concerted effort to preserve audio tracks here in this community that are not already available “officially…” It got me thinking… are the mono/stereo audio tracks from DVDs and blu-rays the actual original audio tracks?  Or are they strictly mixdowns of the new surround sound mixes (much like The Terminator mono mix on DVD)?

Thank you.

It wont sync to anything, you would need to edit the sound down to the R rated version we have on home video now