USB.org has a 373 page pdf on cable and connector specifications, to start with.

Actually never noticed that before. I would only use it occasionally for the search function.

It brings up this search interface

• Threads will navigate between top comments
• Search word will ask for a search term and then navigate between comments with that term.
• Time will prompt user to input an amount time with a slider bar, navigation arrows then only look for comments that are newer than that time
• moderator searches for moderator comments.

The soundtrack isn't directly on the 70mm film, it's digital and sort of manually synced to the film. I believe IMAX film and IMAX digital uses the same soundtrack and the same standards but obviously the room dimensions and other properties will have some influence on the outcome.