About FixNoise

FixNoise is a small set of free tools for cleaning up recordings: removing background noise, removing hum, and setting the volume.

How it works

Hum removal and volume work right in your browser, so those recordings never leave your computer. Noise removal needs AI models too large for a browser, so it runs on our cleaning server, which deletes each recording as soon as it is done.

What it uses

• FixNoise Fast uses DeepFilterNet3, an open source neural network for speech. FixNoise Studio first lifts the voice out with a Mel-Band RoFormer model, then polishes it with DeepFilterNet3.
• Hum removal uses narrow filters placed on the mains frequency and its harmonics.
• Loudness is measured in LUFS the same way broadcasters and streaming services measure it (ITU-R BS.1770).