Pitch Adjusting Music In Films

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I don't know if anyone else can notice this, but when listening to songs in Films, the pitch is minutely adjusted to be a little higher as if it's on a Vinyl Record, and I don't understand why.

The only example I can give to show you what I mean is Withnail & I.

It predominantly uses Jimi Hendrix (as it's set in 1969), and you notice that All Along The Watchtower is 'slowed down' in this scene:

[youtube]http://www.youtube.com/watch?v=QlhwR8EogiE[/youtube]

Yet on my DVD, it sounds like this, even though it is credited as being 'slowed down'.

[youtube]http://www.youtube.com/watch?v=bng3agUOYiI[/youtube]

The second scene (ignoring the infamous Anachronisms) has the song played in the background like this.

[youtube]http://www.youtube.com/watch?v=K-GGEJRz6So[/youtube]

Yet on my DVD, once again it sounds (pitch-wise) like this live performance of them:

[youtube]http://www.youtube.com/watch?v=wOuxtUPQSPw[/youtube]

And I'm just curious to how they remaster the sound, and why it sounds like the pitch has been adjusted by "0.50 cents" as Audacity puts it, as if it's being played off a Vinyl.

Also, does this mean I have perfect pitch? If I can differentiate between these minute changes.

all kinds of ways to do it without vinyl records.

Theyve had CD players with pitch adjust for a long time.
In fact, for party deejays, they have high end CD players with devices on which you can apply your hands and "scratch" and backspin the CD's as if they were vinyls. They have oldfashioned analog cassettes that you can adjust pitch (and reel to reels) and they have many kinds of audio software ( sound studio, adobe premier, are the two im familiar with) that can tweek pitch.
there is even a program for desktops that simulates two turntables and a mixer for at home deejaying.

Many ways to skin that cat.

About why they would do it: I cant veiw your video clips on my old computer but there are more than one reason why they might do that: speed it up to save time because the scene is short, or slow it down to match the action or match the mood of the scene.

Thankyou very much naturalplastic.