The VSA (Voice Stress Analyzer) machine is not a lie detector. In fact, many truthful people who have taken the VSA examination have been branded liars. Several credible studies have determined that the accuracy of lie detection exams is around 50%, no better than flipping a coin!
Here go get the software and practice beating it lol:)
http://x13vsa-pro-voice-lie-detector.x13vsa.downloadsoftware4free.com/