"Normally, the way to fix that would be to try to find some of that same ambience from somewhere else," Prisk says, "or wild sound that you've recorded on location, and try to plug it in underneath.

This fall, iZotope released version 4 of its RX audio repair software. Along with RX4 Advanced comes a new module called Ambience Match. As the name implies, Ambience Match can be used to learn ...