About the voices:

The voices are synthetic. Therefore the words and sentences may not be pronounced in the way you would expect. Here comes a few tips on how to "trick" the voice into pronouncing what you have written in the most natural way:

• Check that what you wrote is actually correct!!!
  This is the most common cause of unnatural speech...
• Do not write words in upper case, the speech engine may
  think that it should spell out the letters of such words.
• Try different punctuation marks in the end of a sentence,
  for instance comma, period and question mark.
• Write more phonetically correct (as words are pronounced).
  This is easiest to do in languages were words are written
  closer to how they are pronounced.
• Add small words like some, always, etc.
• Rephrase the sentence, it is often easier than you think.
• Short, simple sentences are often the best.

If you bump into examples that sound less natural, you can send the complete text to . DO NOT send the video, it is the text that is important. In this way you can contribute to creating a better voice.