@jbcrawford I feel very privileged to have been able to experience an #IMAX #projection room before they went digital. Just like the 15/70 film projection system, preshow was also a big deal: when the theater chain was later bought out and renamed, the spoken track was updated and they updated the logo which was projected onto the screen, but the expensive and custom laser show was untouched:
https://youtube.com/watch?v=f0h2pqejZvE
It was all because I had arrived _really_ early — I was the only one in the theater — and just _had_ to know the name of the great track the projectionist had chosen to play during the lights-up downtime. I asked someone and they had no idea so they asked the projectionist, who for reasons unknown offered me a private tour of the projection room on the spot, which is a fond memory of mine over a quarter of a century later. He even gave me his business card, which, alas, was lost to the sands of time.
Oh, and that track? https://open.spotify.com/track/41AYCzvMGOdYusD7tXriDI