i was going to suggest Ableton Live Lite for you, some tweaking with the samples (slowing, repitching, stretching pauses between words, etc.) + vocoder might do what you're wanting, but it doesn't look like the vocoder effect is included in the Lite version. it does have Beat Repeat which has a couple of defaults that can do some pseudo-vocoder things.
edit: if you can give me a decent written explanation of what you're wanting changed with a recording i could try to do it, worst case scenario