ONE-2 · DEPARTURE TONE · NOT RETAINED

A goodbye that is only said once.

Fitted to the outbound gate. Every departure is given its own tone, built at the moment of leaving, played into the concourse, and then discarded. No two are alike and none is kept.

What A single-use farewell tone. The parameters are generated, sounded, and overwritten in the same breath.
Who Whoever is leaving. Once, and not again.
When At the gate, as they go through.
Note The certificate below records that a sound existed. It does not record the sound. There is no way to hear one twice, including for the person who built the machine.

volume up · each press is a different tone and the last one is already gone