# Noise & hum

> Reduce hiss and mains hum with high-pass, low-pass, and FFmpeg's afftdn denoiser locally.

Reduce hiss and mains hum with high-pass, low-pass, and FFmpeg's afftdn denoiser locally.

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Canonical HTML: https://www.safepaper.app/audio/noise-reduction
Markdown: https://www.safepaper.app/audio/noise-reduction.md

There is no upload endpoint — your files are processed in this browser tab. Open your network tab and check.