What your inSync editor wishes he was doing this Super Bowl Sunday instead of walking his legs off at the NAMM show. In the domain of audio/video production layback is the process of laying audio back in to video for the final video product. During video projects it is common for the audio and video to be edited separately (sometimes in separate facilities in different states or countries). Once the video and its audio are finalized they are combined together. This process is called layback and has historically been done on layback machines that are designed for this purpose.