Eliminate Microphone Hiss Offline
Recording podcasts, lectures, or vocal tracks in imperfect environments almost guarantees the intrusion of "Noise Floors"—the constant, low-level drone of computer fans, HVAC air conditioners, or inexpensive microphone static components. Stripping this without uploading massive uncompressed WAV files to cloud servers is traditionally difficult.
How does Fast Fourier Denoising (afftdn) work?
By routing the audio file entirely securely through our WebAssembly (WASM) implementation of the FFmpeg command line, we utilize mathematical fast-Fourier transforms. The engine samples silent portions to calculate the ambient frequency curve. It then subtracts that exact frequency footprint out of the entire recording, silencing the hiss while leaving the primary human vocal frequency bands untouched.