Elon Musk says Teslas will be able to blast jazz and elevator music through their external speakers

· Teslas may soon be able to play elevator music and jazz through their external speakers, according to a Thursday tweet from Elon Musk. 
· It's not clear if Musk was serious about the new feature. 
· Tesla is well known for including playful features and Easter eggs, such as a fart mode, in its cars.
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