http://www.youtube.com/watch?v=s24Vx-yfHUE
Features
- Listen through your headphones
Visualize and detect even the most inaudible detonation sounds
Detects optimum knock frequency
Save and replay recordings
View Logs and compare to EMS log
High precision
2 sensor input support
Bore size to frequency
Adjustable frequency window
Adjustable threshold
Adjustable sensitivity
Designed for even the beginner
Save and load configurations
Future releases at no extra charge
Actually, I made this software myself. Made it as a response to members on another forum asking for ways to listen and detect knock accurately without spending hundreds of dollars.
Tutorial: https://www.youtube.com/watch?v=tw-QfLgamUQ
:) Enjoy