1. A method for preparing a text-to-speech (TTS) voice for testing and verification, the method comprising: processing a TTS voice to be ready for testing; synthesizing words utilizing the TTS voice; presenting to a person a smallest possible subset that contains at least N instances of a group of units in the TTS voice; receiving information from the person associated with corrections needed to the TTS voice; and making corrections to the TTS voice according to the received information.