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MuScriptor
Paris, France
What it is
MuScriptor converts recordings into MIDI and sheet music. Its hosted service provides MIDI files, sheet-music PDFs, and guitar-tab PDFs for download, and the web demo accepts MP3, WAV, FLAC, OGG, M4A, AIFF, and Opus files. It can transcribe voice, piano, guitars, bass, strings, brass, woodwinds, drums, and other instruments; users can specify expected instruments to help improve accuracy. Guitar and bass parts receive tablature alongside standard notation, but the system does not write chord symbols. MusicXML output can be edited in MuseScore, Sibelius, or Guitar Pro. The web interface can be self-hosted, and transcription is also available through a CLI and Python API. Local use requires Hugging Face authentication and acceptance of the model’s CC BY-NC 4.0 license. Hosted uploads are processed on the server and not retained afterward, while local use keeps audio on the user’s machine. The service says it works better on acoustic and guitar music than electronic music, and that results are not perfect. The hosted demo and code are free; model weights have a non-commercial license.
For and against
For
- Exports MIDI, sheet music, and guitar tabs
- Accepts seven listed audio formats
- Supports many instruments and voice
- Offers a CLI and Python API
Against
- Does not write chord symbols
- Works better on acoustic and guitar music than electronic music
- Local use requires authentication and license acceptance
The verdict
MuScriptor offers free transcription with hosted downloads and options for local use. Its stated accuracy is stronger for acoustic and guitar music, and it does not produce chord symbols.
Who it suits
MuScriptor suits musicians who want to turn recordings into notation or MIDI, especially for acoustic and guitar music. Local deployment may suit users who want audio to stay on their own machine and can meet the authentication and license requirements.
Plans and prices
Free open-source MuScriptor
browser transcription · MP3/WAV upload · MIDI · sheet-music PDFs
Read 14 Oct 2026 · muscriptor.kyutai.org
Free
free hosted demo · MIT-licensed code · model weights CC BY-NC 4.0 non-commercial
Read 30 Sep 2026 · muscriptor.kyutai.org
On the record
- Accuracy limitation
- The service says it works better on acoustic and guitar music than electronic music and is not perfect.muscriptor.kyutai.org · read 30 Sep 2026
- API detail
- The Python API supports instrument filtering, sampling, temperature, beam search, batching and prelude forcing.pypi.org · read 14 Oct 2026
- Audio formats
- The web demo accepts MP3, WAV, FLAC, OGG, M4A, AIFF and Opus files.muscriptor.kyutai.org · read 30 Sep 2026
- Browser interface
- The hosted site runs as a JavaScript web transcriber with no installation described on its home page.muscriptor.kyutai.org · read 14 Oct 2026
- CLI
- The package provides a command-line transcribe command that writes MIDI, JSON, JSONL or sheet outputs.pypi.org · read 14 Oct 2026
- Code licence
- The inference and application code is released under the MIT licence.github.com · read 14 Oct 2026
- Crunchbase facts
- Crunchbase lists Kyutai as an active Paris nonprofit with 11–50 employees and founders Laurent Mazare and Neil Zeghidour.crunchbase.com · read 14 Oct 2026
- Documentation depth
- Documentation includes installation, model selection, CLI examples, Python usage, server operation, output formats and development setup.github.com · read 14 Oct 2026
- Full-mix transcription
- The model is designed to transcribe complete mixes containing several simultaneous instruments.mirelo.ai · read 14 Oct 2026
- Hardware guidance
- Small is recommended for CPU-only machines, medium is the default trade-off, and large is intended for GPU use; Apple Silicon uses Metal automatically.github.com · read 14 Oct 2026
- Independent technical coverage
- A Japanese independent article reports that MuScriptor handles full mixes, explains its training approach and compares local, browser and Mirelo Studio use.note.com · read 14 Oct 2026
- Independent usage report
- A Russian video review demonstrates local installation, memory use, MIDI export and opening results in MIDI editors.rutube.ru · read 14 Oct 2026
- Input formats
- The local package accepts WAV and other formats supported by libsndfile, including MP3, FLAC, OGG and M4A.huggingface.co · read 14 Oct 2026
- Instrument detection
- It detects and labels parts such as voice, drums, bass and synth lead.mirelo.ai · read 14 Oct 2026
- Instruments
- It can transcribe voice, piano, guitars, bass, strings, brass, woodwinds, drums and other instruments.muscriptor.kyutai.org · read 30 Sep 2026
- Instrument targeting
- Users can specify expected instruments to improve transcription accuracy.muscriptor.kyutai.org · read 30 Sep 2026
- Integrations
- MusicXML output can be edited in MuseScore, Sibelius or Guitar Pro.muscriptor.kyutai.org · read 30 Sep 2026
- Kyutai company
- LinkedIn lists Kyutai as a Paris nonprofit founded in 2023 with 11–50 employees.linkedin.com · read 14 Oct 2026
