This is not generally known, but it should be better known, especially in this community. A lot of the time, if not basically all of the time, the audio mix you hear when you watch John Carpenter's 1978 film "Halloween" isn't the audio mix we heard when the film was in theaters and on early home video.
It's been remixed, and totally reconstructed, many scenes utilizing sound elements that are modern and didn't even exist when the film was released.
We're very familiar with this now, with the many variant edits and special versions of films. There's a lot to choose from, and many times you can change the audio track option with a mere click of a remote.
That's why I suggest you pop in that dvd and go to "audio options" and become familiar with the original MONO sound. Because -- that's the original sound. Very important to make this distinction.
If you are listening to a 5.1 mix or any form of surround or stereo mix, that mix contains not only layers of high-tech new digital stereo sound effects, and the title music--you know, the credits, with the pumpkin- -well, that is a totally different track. It sounds similar on the surface and keeps the same beat. But that is where the similarity ends.
In most every respect, the "opening titles track" now used on the modern surround mixes is entirely new, and a relatively recent construction made with clever new technology.
This particular film was the start of a fairly popular horror franchise, having performed phenomenally well in theatres on its initial run. As such, the fans should certainly be aware of the audio changes it has undergone in terms of variant sound mixes and newly/recently recorded tracks. It's a memorable film, a very scary film, that deserves its fandom.