KrystalComp
Key Features
- Standard threshold, ratio, attack, and release controls are paired with variable knee and hold, so the compressor can stay transparent on buses or clamp harder on tracks without feeling underpowered.
- RMS and Peak detection modes let you bias the response toward smoother average-level control or quicker transient handling depending on the source material.
- Internal and external sidechain routing plus LP, HP, and bell filters make it practical for ducking, low-end-aware bus compression, and more focused trigger shaping than a basic one-path compressor.
- The sidechain monitor button lets you audition the trigger signal directly, which makes filter decisions faster and more repeatable than compressing blind.
- Mix, input, and makeup gain controls plus automatic loudness matching support parallel compression and more honest A/B comparisons while you dial in dynamics.
- A real-time waveform display and comprehensive input, output, and gain-reduction metering keep the plugin readable enough for precision mix or mastering cleanup instead of guesswork.
Description
KrystalComp is a precision digital compressor from Krystal Dynamics for macOS and Windows, built for clean control over track, bus, and mastering dynamics instead of vintage-color theatrics. Its core workflow stays familiar, but the official page makes clear that the bigger draw is how much sidechain shaping and metering it packs into a compact, straightforward layout.
That extra control is what separates it from a generic freeware compressor. RMS and Peak detection modes, variable knee, hold, mix, input and makeup gain, automatic loudness matching, and a real-time waveform display give you enough feedback to move from subtle leveling to firmer transient control without losing track of what the processor is doing.
The sidechain section is the strongest part of the package. BPB highlights the internal and external sidechain routing, LP, HP, and bell filtering, plus the monitor button, which makes KrystalComp more useful for ducking, low-end-aware bus work, and targeted cleanup than a barebones one-flavor compressor.
As checked on April 28, 2026, KrystalComp still clears SSA's permanent-free bar. The official KrystalComp page still labels it completely free for personal and commercial use, the Krystal Dynamics homepage still says all plugins are provided free of charge, and the Windows and macOS ZIP installers remain publicly downloadable from GitHub Releases with no checkout, signup, or expiry wording.
Frequently Asked Questions
Is KrystalComp only useful on mastering chains?
No. The official page positions it for both mixing and mastering workflows, and the sidechain tools make it just as usable on vocals, drums, bass, and buses as on a final stereo chain. It is better thought of as a clean all-round compressor with enough control for detailed work, not a mastering-only specialist.
What do the RMS and Peak modes change?
Krystal Dynamics provides both RMS and Peak detection so you can tailor how the compressor reacts to the source. In practical terms, Peak mode reacts more directly to fast transients, while RMS mode follows the average energy of the signal more smoothly for gentler leveling behavior.
Can KrystalComp use an external sidechain and shape it?
Yes. The official feature list includes both internal and external sidechain input, plus a sidechain equalizer with LP, HP, and bell filters. The monitor button also lets you audition the sidechain signal directly, which is useful when you are dialing in ducking or trying to stop the compressor from overreacting to low end.
Does it support parallel compression and level-matched comparison?
Yes. KrystalComp includes a mix control for parallel compression, along with input and makeup gain plus automatic loudness matching. That combination makes it easier to compare settings by ear without being fooled by simple volume increases.
Is KrystalComp still permanently free right now?
As checked on April 28, 2026, yes. The official KrystalComp page still says it is completely free for personal and commercial use, the Krystal Dynamics homepage still says all plugins are provided free of charge, and the public Windows and macOS ZIP downloads remain live with no checkout, signup, or expiry wording.
