Release (Compressor)
Definition
The time it takes for a compressor to return to unity gain after the signal falls below the threshold. A fast release can cause pumping; a slow release provides smoother, more transparent control.
In Simple Terms
How fast a compressor lets go after the loud moment passes. Too fast and you hear pumping-the volume breathing unnaturally. Too slow and the compressor never resets before the next hit. Finding the right release makes compression invisible.
In Practice
A slow release on a vocal compressor prevents audible pumping between phrases, maintaining consistent compression even as the singer takes breaths between lines.
Common Confusion
A "fast" release is not always shorter in milliseconds. Modern auto-release algorithms adjust release time dynamically based on program material, a fixed 50 ms release on a sparse track behaves differently than the same 50 ms on a dense track. The auditory result, not the number, is what matters.
Sources & Verification
- Giannoulis, D., Massberg, M. & Reiss, J. D.. Digital Dynamic Range Compressor DesignJournal of the Audio Engineering Society, 2012
- Izhaki, R.. Mixing Audio (3rd ed.)Focal Press, 2017
Last verified: 2026-05-05