These are demonstrations of emoSyn generating emotional expression by rule.
All audiofiles are mp3 format.
The samples were part of a perception experiment. The article Verification of Acoustical Correlates of Emotional Speech using Formant-Synthesis can be downloaded here.

A short explanation of the modification parameters is given here

The original sentence (wav-file) comes from our emotional database (actors simulating emotions) and is meant to be semantically emotional neutral, in the sense, that it could be appropriate for any emotion. The english translation would be something like:
At the weekends I always drove home and visited Agnes.

a selection of these demos as well as comparison with other systems can be found here.