A six-minute video presentation that explains Dolby Digital on LD and DVD.
Includes "Train", "City", "Canyon", "Egypt" AC3 Trailers and Music Demo Material as well as several tests signals:
High Level Test Signals
Dynamic Range Test
Mode and Channel Check
Downmix Null Test
Frequency Response Sweep Tones
Pro Logic Level Test
Additional Information by dnelms
This disc was only available for purchase from Dolby Labs. I was able to obtain a copy through a purchase at the 1997 Stereophile Home Entertainment Expo at Dolby Labs demo booth. If memory serves me correctly the purchase price was $20.