When we started the Blue Lion project we looked at what other companies had done so far to deploy tourism services and content on mobile phones. We were struck by how many features were built in some of the mobile guides. We will review some of these features in a series of articles. Today we look at audio reading. Providing audio to visitors is somehow essential: the smart phones or tablets are portable devices, just like audio guides in museums. You definitely do not want to read the text while looking at a painting (or monument). So, audio is a necessity, especially when you have a good quality content that is long enough to explain things thoroughly. If your text is just a paragraph or two you should not embark audio in your solution. Natural voices Now, how to provide audio? The best would be to offer natural voice, which implies having real people (hired or not) reading the text. While the results are definitely the best you can get, there are some drawbacks: unless you r...