Top 5 C noise-reduction Projects

rnnoise

16 3,657 4.7 C

Recurrent neural network for audio noise reduction

Project mention: RNNoise 0.2 – now trained using only publicly available CC-licensed datasets | news.ycombinator.com | 2024-04-16

noise-repellent

7 428 0.0 C

Lv2 suite of plugins for broadband noise reduction

Project mention: Linux Audio Noise suppression using deep filtering in Rust | news.ycombinator.com | 2023-06-06

Frankly, what I hear is very similar to the results of classic spectral denoising, even with the characteristic artifacts (for Linux, there's Noise Repellent [1] available for advanced spectral denoising; there's also a ton of commercial spectral processors).
The demonstration could use more random background noises to separate it from spectral processors, and more varied vocabulary to separate it from RNNVoice [2] which tends to suppress breath and parts of sibilants, making the sound unnatural. The latency is also important - is it as low as in RNNVoice? What about the CPU load?
[1] https://github.com/lucianodato/noise-repellent
[2] https://github.com/werman/noise-suppression-for-voice

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speech-denoiser

1 281 1.8 C

A speech denoise lv2 plugin based on RNNoise library
libspecbleach

1 55 10.0 C

C library for audio noise reduction and other spectral effects

Project mention: SoX noise reduction | /r/linuxaudio | 2023-07-12

https://github.com/lucianodato/libspecbleach is a marvelous denoiser. This library includes two example programs (with hardcoded parameters) that you can try as is or customize to your liking. adenoise_demo works without you specifying the section of noise, but the first half a second of recorded audio will be gradually less noisy while it adapts. denoise_demo learns the noise profile on the first 4096 samples and denoises the rest (so the output is 4096 samples short).

pw-nvidia-denoiser

2 14 1.8 C

Pipewire NVIDIA Denoiser DSP Filter
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NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).