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Now You Can Turn Your Computer
Into A Truth Verification Device

Imagine if YOU had the power to know the Truth..

Fully computerized voice stress analyzer
 that allows you to detect the truth

The world's Nr. 1 Voice Stress Analyzer (Voice Polygraph)
- Works in any language! -
Turn your Laptop or Notebook into a real portable Voice Polygraph

The only Lie Detection Software which you can trust...
X13-VSA is the most advanced and cheapest VSA system in the world
X13-VSA is a Voice Stress Analysis Lie Detector Software
The most advanced voice analysis technology available today

All other VSA systems on the market are too complicated to use!
Most VSA users are tired of over-complicated Voice Stress Analysis applications that are getting harder and harder to use and training is required for operation.
Get power and simplicity, use X13-VSA
X13-VSA focuses on what you want: to find out the TRUTH!


The “next-generation” of X13-VSA
A high-accuracy, advanced and easy-to-use Voice Analysis Technology

(Speech Analysis) for defense and civilian markets


The evolution of Voice Stress Analysis (VSA) - Tested and approved!
Our software doesen't use the controversial “Layered Voice Analysis” (LVA) technology

X13-VSA Home

X13-VSA Home voice stress
                  analyzer. Click on image to enlarge...

X13-VSA Version 3.0 Screenshot
For home users and non-professional end users  Click on image to enlarge.



X13-VSA PRO voice stress
                  analyzer. Click on image to enlarge...

X13-VSA PRO Version 3.0 Screenshot
(Designed for security officials) click on image to enlarge.


X13-VSA PRO Cobra

                      and deception in speech, evaluating of voice


X13-VSA PRO Cobra, few Screenshots of Version 3.6.0
(Designed for Professional Use Only) click on image to enlarge.


Prof. Dr. Marco Strano Italian
                                State Police. President of the
                                International Crime Analysis
Prof. Dr. Marco Strano, Psychologist and Criminologist, Italian State Police and President of the I.C.A.A.
(International Crime Analysis Association)
X13-VSA PRO Cobra user.

*Our client base covers law enforcement agencies, law firms, journalists, professional investigators, corporate clients and institutions and private persons from around the world. We are unable to disclose the identity of all our international clients, agencies or companies due to strict privacy protection and legal restrictions.

International Crime Analysis Association
Click on the picture to
visit the I.C.A.A. Website

Police & Law Enforcement
                                  News, Jobs and Training



X13-VSA “Dedicated to Truth”
Protect yourself from Lies, Theft & Fraud

"With only one click" - Your Personal Truth Verifier. For people who need to know the truth...

X13-VSA is an innovative, advanced and sophisticated software system and a fully computerized voice stress analyzer that allows you to detect the truth instantly. The system is based on an ingenious new and old algorithm to detect vocal stress. X13-VSA is a voice emotion analyzer, capable of detecting deception and lies using the most advanced technology.

The X13-VSA technology was originally developed for military use
And n
ow you can use the same technology to detect lying and deception

Law enforcement agencies worldwide use VSA technology alongside polygraph


 The software is clear, elegant, and so easy to use that you can have it up and running within seconds;

  There is no need to waste your time and money on seminars or training to use the X13-VSA Voice Stress Analyzer Systems;

  X13-VSA is A High-Accuracy and Easy-to-Use Truth Verification Software;

  Works in any language!

 Professional studies have shown a VSA validity, reliability and accuracy at above 97 Percent;

 The X13-VSA technology is the most advanced and cheapest VSA system in the world;

  Each year, more police and government agencies use this modern technology as their primary lie-detection tool;

  Worldwide clients in North and South America, Middle East, Europe, Asia, Africa, Australia/Oceania and even in the Antarctica;

  Our Clients are governments, law enforcement, military, prisons, insurance companies, customs, borders, financial institutions, private individuals and more.



Voice Stress Analysis is a type of Voice Stress Analyzer which measures stress in a person's voice. The use of Voice Stress Analysis (VSA) as a lie detector became popular in the late 1970s and 80s and today is the VSA analysis an alternative to the polygraph as a method for lie detection. VSA systems are already widely used in police, insurance fraud investigations and by other organizations.  
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X13-VSA Products

Researchers found that frequencies in the human voice in (most are the 8 to 12 Hz range) are sensitive to honesty. When a person is being honest the average sound in that range is generally and almost below 10 Hz, and is usually above 10 Hz in dishonest situations.

All muscles in the body, including the vocal chords, vibrate in the 8 to 12 Hz range. This is considered a feedback loop, similar to a thermostat/heater that will maintain an average temperature by raising the temperature a little above the setting, switch off, and not come back on until the temp is a little below it.

Just as the temperature swings up and down over time, so too do the muscles tighten and loosen as they seek to maintain a constant tension. In moments of stress, like when you tell a lie that you dare not get caught at, the body prepares for fight or flight by increasing the readyness of its muscles to spring into action. Their vibration increases from the relaxed 8 to 9 Hz, to the stressful 11 to 12 Hz range. This is known to be caused by the production and release of a chemical, as explained in the Scientific American Article "Psychological Tremor" Vol. 224, No. 3.

Such of vibrations are a measure of stress levels of which change from moment to moment. Everybody knows that stress, also known as anxiety or being up-tight, can be brought on by a simple thought or memory; of a loved one's passing on, for example, or suddenly remembering some dangerous obsticle in the future. Some people have high average stress levels, and some have low, and averages changes from day to day along with mood. What all people have in common is that their stress levels are constantly changing within their current range, changes which indicate the "percieved jeopardy" or "danger" of statements being made. A lie is often dangerous, humiliating, or injurous to get caught at, so lies tend to stand out on stress measurments.

The X13-VSA is a revolutionary new software product that work with your PC or laptop computer for quick and reliable recorded truth verification. Anyone with a computer can use it. X13-VSA looks for changes in voice tone and frequency and performs thousands of mathematical calculations to identify signs that someone could be lying.
You will be in a position to detect deception and verify the truth and you can record conversations for later analysis. You may analyze from TV or radio, or even in a face-to-face conversation, without the subject being aware.


You can make a Real-time analysis or take any recorded conversation, record yourself, spouse, friend, lover etc., (Audio Recording Software is including in the package). Of course when you do this make sure you obtain consent from the person whose voice you are analyzing!

X13-VSA is effective in ANY SITUATION and is applicable to ANYONE, including but not limited to: Criminal investigations, violent crimes, robbery, internal affairs investigations, or pre-employment examinations, insurance fraud investigations, screening (eg: Airports) Check of visa/passports, Witness Statements, covert counter intelligence and much more.  The use of X13-VSA is limited to your imagination.

X13-VSA is a full computerized voice stress analysis software for human lie detection, Love detector for negotiation & entertainment and a is a real lie polygraph software. Your Personal Lie Detector detects deception in the human voice using Voice Analysis Emotions. A Truth & Deception Technologie for (polygraph) lie detection services and more.

X13-VSA is one of the most advanced Voice Analysis systems ever and the easiest to use. It is powerful and it go deeper and faster than any other voice analysis technology (see REF: 2010).

X13-VSA is a professional tool for the Businessman or for Personal use, Governments and Security Organizations, Law Enforcement agencies, Police, Military or Private Investigators.

X13-VSA is a decision support tool, more accurate than a polygraph and in combination with your own judgment and common sense will be a great assistance.

X13-VSA is also a tool to detect lies you hear on your Skype phone. Just record all your phone calls with a freeware application like Pamela for Skype ™ (www.pamela-systems.com) and monitor them with X13-VSA voice-analysis technology for lies and high stress levels.

X13-VSA has been sold to nearly 12,000 professional investigators, law enforcement agencies, law firms, insurance companies, journalists, businessman's and private persons from around the world (over 150 police agencies using the X13-VSA PRO Cobra technology). The use of the X13-VSA technology continues to grow and to receive high profile attention.

Since 2008 the X13-VSA PRO Cobra technology is used also by some international airports to screen travelers.

The X13-VSA technology is the most advanced Voice Stress Analysis system that has yet been produced to detect changes in human speech and the cheapest system in the world.

The X13-VSA technology is far superior to outdated systems such as TRUSTER, CVSA, LANTERN and "Pocket Lie Detectors". X13-VSA IS THE TRUE SOLE SOURCE FOR VOICE STRESS ANALYSIS SOFTWARE.


How accurate is the X13-VSA system?

If the voice quality is good and X13-VSA is used correctly, you can achieve almost 98,9 percent accuracy. Getting these results may take a little bit of practice. You can increase your accuracy by repeating certain questions and analyzing recorded conversations.

Enjoy the newest technology

X13-VSA tell you if someone is telling the truth

Does your partner really love you? X13-VSA Voice Stress Analysis Lie Detector Software can help you to discover if somebody is cheating on you, being unfaithful, or having an affair.  What would you pay to know what the other person is thinking?

System requirements:
All Microsoft Windows® platforms (Windows 9x/ME/2000/NT/XP/Vista/Windows 7/8)
Sound card and compatible microphone


X13-VSA is the most accurate VSA technology and the most technically
advanced digital Voice Stress Analysis system on the market.

What's the difference between X13-VSA and a polygraph? A polygraph measures for physical stress, just like X13-VSA, but a polygraph requires you to be attached.
X13-VSA doesn't. You can also use it on pre-recorded voices.

Enjoy the newest technology and our support.

X13-VSA a
                Voice Stress Analysis Lie Detector Software

No one can lie to you any more because with X13-VSA you know what your friends and clients think about you...

You can be sure that X13-VSA/X13-VSA PRO or X13-VSA PRO Cobra will work flawlessly in every situation. This is due to the extensive testing that takes place before any new version is approved for release into the market place.


Download free information about X13-VSA / X13-VSA PRO / Cobra (0,6 MB).
MD5 checksum: 1e84d97c4c5bc6df689e7f07cb5617a7

Download Now...

Studies Validating Voice Stress Analysis

All X13-VSA Products (Voice Stress Analysis)

How to download a DEMO


X13-VSA Awards

Watch the X13-VSA Movie

VSA a Consumer Technology for Truth Verification

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We guarantee you will be impressed from X13-VSA!

 ...What would you pay to know what the other person is thinking?


Tell a friend:


X13-VSA is a Voice Stress
                Analysis Lie Detector Software...

The most
                advanced Voice-Analysis system ever X13-VSA - Originally
                developed for military use - Get the 'inside scoop' on
                everything you hear from friends, colleagues, potential
                employees, kids, lovers, or anyone!

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The X13-VSA Systems have won far too many awards than is possible to list here. Our new Awards page click here

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