[ajsnigrutin]

This would work if the elevator music was a never-repeating stream. With most elevator music, it's a few minutes of a "song" playing on repeat 24/7, so if you recorded a few repetitions of the "song", you'd probably see also repeated packets on the network.

If the music was repeating but the stream was different all the time, then steganography could be the reason :)

[rhacker]

I haven't actually heard elevator music as much as people say it exists.

In fact I don't think I've every been on an elevator that had music.

[bigiain]

Pretty sure I've never heard Brian Eno playing in an airport either.

[rerdavies]

Tragedy.

Google sez: Music for Airports was installed at the Marine Air Terminal of New York's LaGuardia Airport for a brief period during the 1980s.

Elevator music may no longer be a thing, but apparently, airport music still is:

https://www.youtube.com/watch?v=Km0h6Ix3Zcs

[sublinear]

I think it's a trope from the second half of the 20th century (mostly the 3rd quarter).

[eru]

The modern equivalent is probably mall music?