A type of compressor that prevents a signal from ever exceeding a set ceiling.
A limiter is a dynamics processor — essentially a very aggressive compressor — that stops a signal from ever exceeding a set maximum level, acting as a hard ceiling. It is most famously used at the final stage of mastering, where a limiter is pushed to raise a track's overall loudness while preventing any peaks from clipping. Limiters are also used protectively, to catch unexpected loud transients and keep them under control. Because a limiter clamps down hard on the loudest moments, overusing it squashes dynamics and can make music sound flat and lifeless, so it is a powerful tool best applied with restraint and a careful ear.
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