car giant nissan's technical development centre in bedfordshire. what do you think people expect an electric car to sound like? that was the interesting question that we started with, what should a car sounds like? because none of us had really thought about it. itjust sounds like the engine. the leaf is one of the world's best—selling electric cars and they now come with nissan's reimagined suite of sounds called canto. we wanted to be optimistic and a little bit futuristic, but not to pretend to be anything that the car wasn't. we didn't want to pretend to be a petrol engine, and we ended up putting sort of three together and then melding sounds together and building from there a profile of different sounds that would work with the car. not all new leafs will sound the same. we're the first tv crew to be invited into nissan's top secret semi—anechoic chamber, and paul is the man in charge