I finally got around to film a proper video of Plonat Atek on a real Oscilloscope:

https://www.youtube.com/watch?v=SIQAk9_nc-s

The Audio in this video completely and exactly represents / is all of the stuff you can see on the screen: the Oscilloscope reads the voltages on the left and right audio channel and moves the dot on the CRT screen according to them, while the speaker moves the membrane on the left and right speaker an amount proportional to the voltage.

Of course there's some more information and a few vote buttons on the game page: Plonat Atek :stuckouttongue: