Noise Suppression for Voice

Overview

Noise Suppression for Voice is a free, real-time microphone noise-reduction plugin built on Xiph’s RNNoise. It suits people who can route their microphone through compatible audio software, especially on Linux or Windows; its broad plugin-format support is useful, but the strict audio requirements and incomplete macOS setup narrow its appeal.

It targets background sounds including fans, office and crowd noise, transport, and construction. It supports recording and voice isolation, but not echo cancellation, so it is not a complete audio cleanup suite.

Key features

Noise reduction and voice detection

Voice Activity Detection can silence audio below a configurable voice-probability threshold. The grace-period control is intended to reduce clipped word beginnings and endings. These controls offer some adjustment over when speech is retained, but the maker warns that the plugin can still mistake voice for noise. Poor microphone quality may also limit improvement.

Formats and compatibility

VST2, VST3, LV2, LADSPA, AU, and AUv3 support gives the plugin several possible routes into compatible audio software. It requires 16-bit audio at 48000 Hz and supports one or more channels, so setups that cannot meet that format requirement are a poor fit. The maker reports testing with Equalizer APO v1.2 x64, PipeWire on Arch Linux, Carla on Linux, and Audacity on Linux.

The latest release, version 1.21, lists an updated RNNoise model, wet/dry controls, and runtime CPU detection for AVX2, SSE, and default paths. On Windows, the README describes enabling the VST2 plugin in Equalizer APO. Linux setup instructions cover PipeWire and PulseAudio, including creating a noise-reduced microphone source.

Pricing

The plugin is free, with no free trial or paid tier to weigh against its capabilities. That makes it suitable for users who want microphone noise reduction without a subscription or purchase. Its free price does not remove the practical costs of configuring a compatible audio chain or working within the required 16-bit, 48000 Hz format.

Platforms

Noise Suppression for Voice supports Linux, macOS, and Windows, but setup coverage is uneven. Linux has documented PipeWire and PulseAudio instructions, and Windows guidance covers Equalizer APO. The macOS section invites contributions and leaves setup instructions as TODO, so Mac users should expect a less guided setup.

The project uses the GNU General Public License v3.0. The maker welcomes improvements and asks contributors planning sizeable changes to open an issue first.

Who it's for

This is a strong fit for technically comfortable users who already use compatible audio software and want a free, real-time microphone filter for calls or recording. Linux users have documented setup paths, while Windows users can follow the Equalizer APO guidance. It is less suitable for people seeking a standalone, guided setup, dependable speech preservation in every situation, or echo cancellation. Mac users in particular may prefer software with completed setup instructions.

Pros and cons

• Pro: Six plugin formats provide several ways to incorporate noise reduction into an existing audio workflow.
• Pro: It is free and supports real-time microphone processing as well as recording workflows.
• Pro: VAD threshold and grace-period controls let users adjust how quiet speech and word edges are handled.
• Con: The 16-bit, 48000 Hz requirement can rule out incompatible audio setups.
• Con: Voice may be classified as noise, and poor microphone quality may blunt the benefit.
• Con: macOS setup instructions are unfinished, and echo cancellation is not included.

Alternatives

AI Noise Cancellation Software is the broader category to browse if this plugin's setup or limitations do not fit.

• Kleervox is worth considering if you want a web option or acoustic echo cancellation; its free plan includes one hour of cleaning per day.
• DeskBroadcast is a macOS alternative with a free plan and a Pro option at $79, paid once for 3 Macs.
• NoiseTorch-ng is a free Linux option for PulseAudio or PipeWire users.
• NoNoise Mac is a free, open-source alternative for macOS.
• NVIDIA ShadowPlay is a free Windows option requiring Windows 10 or 11, GeForce driver 551.52 or later, and a supported GPU.
• Noise Gator is another free option for Windows and macOS.
• Utterly is a freemium option for Windows and macOS.
• NVIDIA Broadcast offers free AI audio and video effects for RTX PCs and workstations.

Verdict

Choose Noise Suppression for Voice if you want free, real-time microphone noise reduction, already have compatible audio software, and can meet its 16-bit, 48000 Hz requirement. The multiple plugin formats and documented Linux and Windows routes are its clearest strengths. Look elsewhere if echo cancellation, a finished macOS setup guide, or stronger assurance that speech will not be suppressed matters more.