AV Latency.com provides free resources to help reviewers cheaply and accurately report audio/video latency, input lag, and lip sync error of consumer electronics.
Introduction
There are many latency factors in consumer electronics that accumulate to result in a delay, or lag, between a physical input action and the final resulting sound and light output. In the case of a home video game console, most of this latency is entirely outside of the consumer’s control and only the “sink device” latency can be reduced or controlled through choice of display or sound system. This sink device latency is the focus of this website, rather than the source device or transport interface.
This website focuses on consumer electronics technologies with raster scanning (or similar) video transport interfaces that are commonly used for home entertainment, video games, computer workstations, and esports. Professional technologies, such as those for music production or live performance, are not the focus of this website, but some of the terminology and test methods may still be useful.
Getting Started
Before jumping into latency measurements, give the Terminology page a quick read. If you’re interested in measuring audio latency, then Acceptable Audio Latency and Lip Sync Error is a good place to start.
About the Author
Allen Pestaluky is a video game developer who is most known for co-creating Keep Talking and Nobody Explodes. For many years he has had a passion for measuring latency and developing accessible methods for testing that anyone can use.