Limiter
Definition
A compressor operating at an extremely high ratio — typically infinity:1 — that prevents a signal from exceeding a set ceiling. The primary tool for loudness maximization and true peak control in mastering.
In Simple Terms
A hard ceiling for your audio volume. Nothing gets through above the level you set. Used at the end of mastering to make your track as loud as possible without distorting. Every song on every streaming platform went through a limiter.
In Practice
A true peak limiter on the mastering chain ensures the final master does not exceed -1.0 dBTP, meeting streaming platform delivery specifications while maximizing perceived loudness.