By the way a 192 kbps stereo Dolby Digital track is considered to be "transparent" by most audio engineers.
Doug, can you elaborate on this, particularly, what would "transparent" mean regarding audio...
- An optical track would be very rarely be used to master the sound for DVD or HD, and only if there are no existing original MAG tracks. Budget and PD labels that use 16mm and film prints as sources, definitely, but not for big studio releases except when there are no alternatives.
The original mag would sound much better than the optical track, and for the most part, the home theater enthusiast will be hearing a much richer soundtrack with a greater dynamic range than was present on the mono optical prints.
As far as I'm aware, the Academy roll-off and EQ would occur during the production of the optical track, and the original mag should not have it. Whether they made a dupe of the original, with roll-off prior to making the optical track negative, is something I'm not 100% on.