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Well, it's a good video but... Hacker News?
On the related topic, you know how in Ford Mustang the engine noise is simulated so the engine would sound like a pre-emission-standards V8 even if it runs on just four? How about a similar thing for a motorcycle? You put on your noise-canceling head phones, and the phones emit a "noise-canceled" rev of an engine you choose. You can enjoy the sound of a Harley on a moped. And! Since it's your headphones only, you wouldn't even bother the public.
I think there is a startup potential on it somewhere. And the technology is here too: https://github.com/ange-yaghi/engine-sim