Is there any coincidence between the scene in "Alien Prometheus" where the engineer pilot ignites the spacecraft by a piccolo and 1960s phreaking(2600 Hz whistles)?
https://www.youtube.com/watch?v=NegOHzcBlHQ (1:09)
btw, In the real world, in addition to the early Ma Bell telephone system(in-band signaling), are there any complex systems that are controlled by tones (not human voice)?
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