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SPECIFICTION
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Alt Denoiser

github.com

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Spec score 7.5 #10 of 24 in AI Noise Cancellation Software

What it is

Alt Denoiser is a real-time audio noise suppression plugin based on DeepFilterNet. It is free and open source, with precompiled downloads for Windows, macOS and Linux in VST3, VST2, AU, LV2 and Standalone formats. DeepFilterNet3 models are bundled, so no separate model download is needed. The plugin accepts any host sample rate and resamples automatically. Its interface has an attenuation control and input and output RMS meters. Version 1.0.2 supports mono-to-mono, stereo-to-stereo and mono-to-stereo routing, and declares 1,920 samples of latency for startup and reset FIFO prefill. Release notes mention fixes for stutter and dropouts in EqualizerAPO and DAWs at standard host buffer sizes. Linux build instructions cover Ubuntu/Debian, Fedora and Arch; building from source requires CMake 3.15 or later, Rust and a C++ compiler. The project is licensed under GPLv3 and directs questions and bug reports to GitHub Issues. macOS binaries target macOS 14.0 and later.

Spec sheet

Purpose
Alt Denoiser is a real-time AI audio noise suppression plugin based on DeepFilterNet.Read 8 Oct 2026 · github.com
Intended users
The project describes plugin builds for audio hosts and a standalone app that can run without a host.Read 8 Oct 2026 · github.com
Support
The repository exposes GitHub Issues for project questions and bug reports.Read 4 Oct 2026 · github.com
License
The project is licensed under GPLv3.Read 8 Oct 2026 · github.com
Audio routing
The v1.0.2 release notes list Mono-to-Mono, Stereo-to-Stereo, and Mono-to-Stereo routing support.Read 8 Oct 2026 · github.com
Build requirements
Building from source requires CMake 3.15 or later, Rust, and a C++ compiler.Read 8 Oct 2026 · github.com
Controls and metering
Its interface has one attenuation control and input/output RMS meters.Read 8 Oct 2026 · github.com
Downloads
The Releases page lists precompiled Windows, macOS, and Linux builds in VST3, VST2, AU, LV2, and Standalone formats.Read 8 Oct 2026 · github.com
Host compatibility
The release notes mention fixes for audio stutter and dropouts in EqualizerAPO and DAWs at standard host buffer sizes including 512, 1024, and 128 samples.Read 4 Oct 2026 · github.com
Host examples
The release notes cite Cubase, Reaper, and FL Studio as example DAWs for the VST3 plugin.Read 8 Oct 2026 · github.com
Latency
The v1.0.2 release notes state that the processing FIFO uses a declared 1920-sample latency.Read 8 Oct 2026 · github.com
Linux security fix
The v1.0.3 release notes say Linux plugin libraries use non-executable stack permissions to address loading failures on security-hardened distributions.Read 8 Oct 2026 · github.com
Linux setup
The build instructions list GUI and audio development dependencies for Ubuntu/Debian, Fedora, and Arch Linux and note that JUCE requires X11/XWayland client headers even under Wayland.Read 4 Oct 2026 · github.com
macOS requirement
The v1.0.3 release notes say macOS binaries target macOS 14.0 and later.Read 8 Oct 2026 · github.com
Noise reduction model
The plugin bundles DeepFilterNet3 models, so no external model download is required.Read 4 Oct 2026 · github.com
Noise suppression model
DeepFilterNet3 models are bundled in the plugin, so they do not require separate downloads.Read 8 Oct 2026 · github.com
Plugin formats
The project lists VST3, VST2, Standalone, AU, and LV2 formats.Read 8 Oct 2026 · github.com
Sample rates
The plugin supports any host sample rate with automatic resampling.Read 8 Oct 2026 · github.com

Strong points and limits

Strong points

  • Available as VST3, VST2, AU, LV2 and Standalone.
  • DeepFilterNet3 models are included.
  • Supports automatic resampling at any host sample rate.
  • Precompiled downloads cover Windows, macOS and Linux.

Limits

  • macOS binaries target macOS 14.0 and later.
  • Version 1.0.2 declares 1,920 samples of latency.
  • Building requires CMake, Rust and a C++ compiler.

Who it suits

It suits people looking for real-time noise suppression in audio hosts, including DAWs and EqualizerAPO. It is also intended for use with Windows microphone input devices.

Verdict

Alt Denoiser offers bundled-model noise suppression across several plugin formats and operating systems. Check the stated latency and macOS requirement against your setup.

Where Specifiction places it

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