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