Neiro is a free audio worksuite for source separation, restoration, transcription and editing that processes audio on the user's machine. It offers a Tauri desktop app and a browser interface launched with `neiro ui`; desktop installers are listed for Windows, macOS and Linux. Separation can isolate vocals, instrumentals, harmonic and percussive parts, four- or six-stem mixes, and drum kits, with a null-test residual for each result. Restoration tools cover declipping, hum removal, denoising, dereverberation, bandwidth extension and reference mastering. Transcription can produce MIDI, MusicXML, ASCII tablature and LRC lyrics. Studio provides non-destructive waveform edits, while Learn includes practice features such as loop regions, count-in, metronome, step mode, WebMIDI and DAW wait mode. VST2 and CLAP injectors can capture audio from a DAW. Core DSP does not require model downloads; neural backends are optional. The interface binds to 127.0.0.1, with no outbound network activity by default apart from user-initiated model downloads and updates. The Python package requires Python 3.10–3.12; compressed or video inputs require ffmpeg on PATH.
Who it is for
Neiro suits audio creators who want local tools for separation, cleanup, transcription, editing or practice. Users choosing neural models should review each model's license, and users of compressed or video inputs need ffmpeg on PATH.
What is good
- Audio processing stays on the user's machine.
- Core DSP works without model downloads.
- Supports separation, restoration, transcription and editing.
- VST2 and CLAP injectors can capture DAW audio.
What to know first
- Python package requires Python 3.10–3.12.
- Compressed or video inputs require ffmpeg on PATH.
- Some model licenses are non-commercial or research-only.
- Granted Python adapters run without a sandbox.
Verdict
Neiro combines local audio processing with a broad set of separation, restoration, transcription and practice tools. Check model licensing and the input requirements before choosing optional backends or processing compressed and video files.
Compared on audio restoration software
- Free plan
- Yes
- Noise reduction
- Yes
- Click and crackle removal
- Yes
- Hum removal
- Yes
- Declip repair
- Yes
- Batch processing
- Yes
- Workflow format
- both
