How to automatically synchronize two recordings of the same event? Let's say I have two recordings (or more) of the same event. Maybe one has been recorded slightly slower or faster (different "pitch") than the other one and has been started several seconds after or before the other one.

Let's also say, for simplicity's sake, that there are no gaps in the recordings.

I can synchronize the recordings manually in a software such as Audacity by importing the different recordings as tracks and shifting/stretching them, but is there any way to do that process automatically?
There is a plugin called vocalign that will do this. It is designed mainly for aligning vocal overdub and replacment dialog but it should work for what you are doing. You can use it as a VST in audacity. It isn't cheap but, if my memory serves me correct, it has a fully functioning demo.

http://www.synchroarts.com/index.php?PAGEID=products&amp;ID=vocalign