The Big Bang Theory is my most favourite show. The paradox is that it's my favourite show because I love how they combine logic and humour in their writing, but the same love for logic often leads me to find faults with the story line or a particular item in the story when they go off the reservation.
I have talked about this sort of thing before in the episode where Howard misuses a robot hand and the one where Priya sneaks out to meet Leonard. In this post I want to talk about another one.
Season 6 Episode 13 - The Bakersfield Expedition. The guys are driving to the Bakersfield comic-con and Sheldon pesters Leonard to turn on the GPS turn-by-turn guidance. When he turns it on, it starts speaking in Sheldon's voice. Sheldon explains that he hacked the GPS software last night and replaced the audio with his own voice recordings.
In a non-Google maps GPS (SatNav in UK) software it IS possible to hack the software audio.
It IS possible to replace the audio files with any audio files of similar size.
BUT the audio doesn't read like a movie script. It is in fact made up of small audio clips with atomic level instructions. The files would say, for example "turn right", "at the next roundabout" or "you have reached your destination."
It will NOT read out the directions in a continuous audio with space to insert quizzes and information tid-bits in-between.
How do I know this?
I HAVE done this hack in the past. I found several flavours of audio packs online that could be used to replace the built-in audio of the GPS software. My favourite one was the one in Marilyn Monroe's voice. In addition to the normal directions in her sexy voice, when I reached my destination she used to say, in her seductive, breathy voice, "You have reached your destination, Mr. President."