Dynamic Range Processing for Podcasters: Compression, Limiting, and Leveling Explained
Audio processing sounds intimidating to most podcast hosts who aren't audio engineers. The
concepts of compression, limiting, and leveling are actually simple when stripped of technical
jargon — and understanding them changes how you approach finishing your audio before
publishing.
What Dynamic Range Is: Dynamic range is the difference between the loudest moments in your
audio and the quietest ones. In natural conversation, this range is wide: someone speaking softly
creates a signal that might be -30 dB, while the same person laughing loudly might peak at -6 dB. A
24 dB dynamic range is difficult for listeners navigating volume on various devices.
Compression Reduces that Range: A compressor identifies audio above a set threshold and reduces
its level by a set ratio. Set your threshold at -18 dB with a 3:1 ratio: every signal that exceeds -18
dB gets reduced so that 3 dB of actual level increase produces only 1 dB of output increase. The
result is that the loud parts are brought down without affecting the quiet parts.
After compression, you apply makeup gain to bring the average level back up. The net effect: the
loud parts are lower and the quiet parts are higher. The overall dynamic range is reduced, making
the content easier to listen to consistently.
A Limiter is a Compressor With Extreme Ratio: A limiter at -2 dB with an infinite ratio ensures
nothing in your final mix ever exceeds -2 dB. It's a ceiling that prevents digital clipping regardless
of what happens in the compressed signal. Every podcast mix should have a limiter at the final
output stage.
Leveling is Different from Compression: Leveling is manual or automated volume automation that
adjusts specific sections to match a target level. Where a guest was too far from the mic for one
portion of an interview, level automation can raise that section specifically rather than applying a
global compression setting that affects the whole recording.
Target Levels: Podcast platforms have recommended loudness targets: -16 LUFS (Loudness Units
relative to Full Scale) for stereo, -19 LUFS for mono. Most DAWs and audio production software
include loudness metering. Hitting your platform's target level is part of professional final delivery.
