MARF is a general cross-platform framework with a collection of algorithms for audio (voice, speech, and sound) and natural language textanalysis and recognition along with sample applications (identification, NLP, etc.) of its use, implemented in Java.
Speech Made Visible is an experiment in showing some of the qualities of speech in printed text. Analyze a recording for attributes like pitch, intensity (loudness), and speed; then style the words in a transcript to suggest those characteristics.