Audi knows sound, and it wants its upcoming plug-in cars to have as distinctive a grumble as possible, just like its fossil-fuel-burning brethren. That's why Audi engineers are working on "new sound signatures" for future e-tron models. You can tell how seriously Audi is taking this by the way it references the sounds a car makes to music and "emotional sound structures" in the press release below. The stated reason for all this e-sound work is so pedestrians will be able to hear the near-silent EVs, but you could just use any old beep to meet that requirement.
Autoblog, Audi developing powertrain sound of the future for R8 e-tron
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