I would like to know if the audio part of a movie file could be scanned for a particular frequency tone. I plan on injecting an inaudible tone in to the microphone input of a digital camcorder and need to be able to scan the file for this tone. Once the tone is found, I then need to find the time index of the tone. The movie file will have multiple locations of this tone in the file. The purpose is to allow me to sync the video to some externally recorded data. The program would allow the user to step through the movie file or the recorded data and view them together.

If you have any comments or suggestion on direction or doablility of this, it would be greatly apprectiated.

Thank you,
Eldon Zacek