I found this in a review on WWW.GPSMAGAZINE.COM. Is it true?
Like the TomTom GO 910, the ONE comes with a large library of built-in voices, and can be expanded by downloading additional voices via TomTom's website. There are computer generated voices, and real human voices to choose from. If you select a computer generated voice, the ONE will read aloud street names via text-to-speech. If you choose a human recorded voice, only a handful of voice prompts are announced (i.e. "keep right at the fork" instead of "keep right onto Main Street").
Like the TomTom GO 910, the ONE comes with a large library of built-in voices, and can be expanded by downloading additional voices via TomTom's website. There are computer generated voices, and real human voices to choose from. If you select a computer generated voice, the ONE will read aloud street names via text-to-speech. If you choose a human recorded voice, only a handful of voice prompts are announced (i.e. "keep right at the fork" instead of "keep right onto Main Street").