Understanding LUFS

LUFS (also known as LKFS) is an algorithm that calculates the way loudness is measured for modern audio programs. The first iteration of this standard was introduced in 2006, with the current revision being released in 2015. Before LUFS, other standards relied on a combination of signal playback and sound level pressure meters to ensure that the audio was set to the correct level. The ability to measure an absolute loudness level with the signal alone allows for much more accurate and translatable mixes to be delivered and opens up the ability for delivery to be performed with much more accessible tools.

The beauty of using LUFS as a target for delivery when mixing your work is that you can mix to a loudness level you are comfortable with. While there are standards that dictate what levels are supposed to be ideal, the reality of the space you’re mixing in or the tools you use can make it not practical to aim for theater-level loudness. Additionally, if...