Exceptional for podcasts, vocals. Zero artifacts on voice. CPU heavy (~10–12% per instance). Requires SSE4.2 CPU.
Uses an adaptive noise floor estimation with adjustable thresholds. Unlike simple gates, it reduces noise across all frequencies proportionally. noise removal plugin free
No “musical noise” artifacts. Great for cleaning high-frequency hiss (tape, converters) without damaging transients. Requires careful band setup. Exceptional for podcasts, vocals
Instead of broadband subtraction, it compresses/expands specific frequency ranges when they fall below a threshold. Effectively ducks hiss in silent passages. Exceptional for podcasts
No free plugin matches iZotope RX’s machine learning or spectral repair, but for removing hiss, hum, and ambient noise, the above four plugins are professional-grade and cost nothing.
CPU usage ~2–4% on modern i7. Minimal latency (under 10ms). Artifacts are controlled well in “Modern” mode.