Then the Metro was filled with the sound of an old-fashioned speech synthesizer uttering bits of German, and the curtain rose, revealing four middle-aged men standing behind consoles (and looking not unlike characters from some Star Trek-like TV show). They played Computerworld and the projection screen glowed cathode-ray green (older readers may remember this colour); they also did Pocket Calculator, with an animation of a calculator, their (quite topical) anti-nuclear protest song Radioactivity, a version of Neon Lights with a verse in German, and their one song about a pretty girl, The Model.
While they stayed at their workstations, playing keyboards and operating their laptops, visuals were projected on the screen behind them, ranging from the sorts of retrofuturistic computer graphics (lots of wireframes; remember when those were cool and shading was too expensive?) to old stock footage of the Tour de France, train and road travel across Europe and the like.
Their songs varied quite a bit from the recordings; the version of The Robots started with them transposing the main riff into different notes, and went on into some improvisation with new (yet quite fitting) synth lines.
(Oh yes, the consoles they were using looked pretty nifty, consisting of a keyboard of some sort, a foot pedal and a laptop. I wonder whether the keyboard part is an off-the-shelf instrument of some sort, or a box containing various controllers and such, and indeed whether the keyboard is not just a controller for software on the laptop, Kraftwerk being famed for their fondness for Cubase VST.)
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