Hello I need to record lectures and conferences. As this is for personal use, I don't want to buy the semi-professional camcorders, which are the only ones that can use an external microphone. So I got a Tascam digital sound recorder that I'll just put next to a loudspeaker (the sound mixer is off-limit; I already tried this, and it works fine for this use) and will buy a more affordable camcorder to record the video before combining the two tracks using eg. Sony's Vegas or something similar. As an easy way to sync the two tracks, I'm thinking of starting the Tascam and the camcorder, do a clap or whistle or something in front of each device's integrated microphone, so that I know where both tracks start. Which free/affordable application for Windows would you recommend that can locate a signal within soundtracks, so I could just provide a WAV of the clap/whistle and the application will jump to it in both the WAV and the video file? Thank you.