"Do you hear that?" Nico Hulkenberg poses the question almost rhetorically as he applies pedal to metal and zaps the Infiniti Project Black S prototype out of the Salzburgring pitlane. 'That' could be any number of sound inputs: we're in Mozart country, after all, and a stone's throw from where Julie Andrews cavorted in the grass while proclaiming the hills to be alive with the sound of music.
Today that music is provided by a 400bhp V6 gleefully accepting a 160bhp kick through an electric motor generator unit mounted to the Infiniti's rear axle. The electrical skreeee is the noise Hulkenberg is drawing F1 Racing's attention to: the piercing hum of an F1-derived MGU-K doing its thing.
"Sounds just like an F1 MGU-K," Nico cackles. "Right, let's see if we can get up to 200km/h on the pit straight..."