Project status: still useful, but is no longer under development.
This program is a free software channel vocoder, which imposes vocal effects on a waveform. It can be used to make your voice sound "robot-like", to create a singing synthesizer, to disguise your voice, and many other fun things. This effect was made popular by artists such as Kraftwerk and Laurie Anderson, and Daft Punk (using other hardware/software). This particular software works on pre-recorded files, rather than being a live effect.
I originally created this software after doing a research paper about vocoders for a course I took in my first year of University. At the time there were not many options for easy software vocoding, although since then many good ones, such as VST plugins, have become available.