In music documentaries and concert films, the glowing vacuum tubes and massive transformers of a Marshall or Fender stack are iconic visual shorthand for "authenticity."

In a mechanical context, a "tranny tube" (short for transmission tube) is a transparent or stainless-steel tube used in a car's transmission system.

Major streaming platforms like Spotify and Apple Music are seeing a surge in "Lo-Fi" and "Analog-mastered" playlists, specifically because audiences are craving the nostalgic, imperfect sound of tube-driven media. 2. The Visual Aesthetic: Tubes in Media Production