DSpeech – Free Text to Speech Program

http://dimio.altervista.org/eng/

DSpeech is a TTS (Text To Speech) program with functionality of ASR (Automatic Speech Recognition) integrated. It is able to to read aloud the written text and choose the sentences to be pronounced based upon the vocal answers of the user. It is specifically designed to quickly and directly provide the functions and improved practical usefulness that are requested by this kind of program. In the meantime, the invasiveness and resource consumption is minimal.

Audio Visualization from NASA

http://learn.arc.nasa.gov/mathtrax/features.html

MathTrax has the ability to sound out the graph being drawn to take understanding one step higher.

For example, if a graph line crosses the same axis twice the auditory visualization will indicate that activity.

Audio playback provides a way to “see” what we would normally not be able to. This particular feature is of great use to the vision impaired community.