Select a few seconds of your recording where only the background noise is present.

ReaFir is a go-to tool for removing steady-state background noise like computer fans, AC hums, or microphone hiss.

ReaFir is essentially five high-precision tools in one, with each mode operating independently:

Functions as a linear-phase mastering or surgical equalizer with zero phase distortion.

Provides per-band compression with a fixed ratio and adjustable thresholds.