Voice Analysis to Figure out Lies

RealScoop (via Techcrunch) is an interesting software - claiming to be a wedding of voice analysis technology to Web 2.0 - by which means it figures out if someone is lying or telling the truth based on audio of the speech. The software attaches a believability meter to the videos on the site that rate the audio portion's "truthiness". Interesting and innovative though it seems, I can see too many variables going wrong with something like this - audio interference, difference between voices and modulation of men and women, other emotions coloring the voice, etc.

I don't think there can be objective analysis of the truth behind a speech without appropriate visual cues to aid the analysis process. I guess we can judge for ourselves....RealScoop plans to cover the VP debate and release believability meter readings for it.