>Lady and the Tramp (1955) 1998 US Academy Laserdisc 14673 AS
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This is the only official home video release of the Academy version of the film, which was native 1.37:1. (close to 4:3)
All other 4:3 releases before and since this LD are nasty pan & scans of the more common CinemaScope version. (2.55:1)
Disney shot the film twice in both CinemaScope and Academy to support both newer and older film theaters in 1955.
Differences mostly include different arrangements of the animation cels and backgrounds, and a few alternate shots. (Example: 23:55 on Side 1)
CinemaScope is definitely the preferred ratio for this today, but the Academy version is an interesting curiosity.

Includes 2.0 Dolby Surround from the PCM track and 1.0 from the left analog FM track. The mono audio is used as default, it's closer to the original.
The original Laserdisc has a 5.1 Dolby Digital track on the right analog channel. It's not possible to rip without special equipment and later LD players, but Disney's audio remixes aren't much to write home about anyway.