FFmpeg

Reduce Voice Recording Noise with FFmpeg Without Destroying Speech

A noisy voice recording is not one problem. Low-frequency handling noise, steady microphone hiss, fan noise, electrical hum, room reverberation, clipping, and codec artifacts have different causes, so a single aggressive denoiser rarely fixes all of them cleanly. FFmpeg provides several useful building blocks for offline cleanup. A practical chain often starts by decoding the source, removing frequencies that clearly do not belong to the wanted signal, applying moderate broadband denoising, and writing the result to an uncompressed WAV file for further processing. The important part is restraint: noise reduction that is too strong can replace background noise with metallic, watery, or gated speech artifacts.