Flash movies can, of course, be built to talk, but not strictly in the sense of the audio content being accessible to users of assistive technologies. ‘Accessible Flash’ does exist, but is both complicated and uncommon. At best, Flash is only accessible if heavily designed to be so, and only then, on Internet Explorer, on a Windows PC.
This is hardly inclusive (missing out nearly 40%, and climbing, of the web population). And even then, it constrains the design of the Flash movie, as dynamic content offers different challenges to reading impaired users.
Talklets can provide a unique solution. Simply adding a variant of the following line of code lets Flash developers make the movie say what they want, when they want, using the Talklets system:
getURL("javascript:lasttext='';curtext='Hello world.';readit();");
In this case it will say: "Hello world".
As this could be for a mouse over event, or on frame load event or anywhere in the code, it allows complete freedom to make highly dynamic flash movies, whilst also serving reading challenged and blind users. In other words, the Talklets approach provides contextual reading of any text, wherever desired, within the Flash movie.