# openutau/OpenUtau

Open singing synthesis platform / Open source UTAU successor

Repository: https://github.com/openutau/OpenUtau
Canonical: https://ross.abutalabs.com/products/openutau
Homepage: http://www.openutau.com
Language: C#
License: MIT
License Family: permissive
Topics: utau, vocaloid, music, singing-synthesis, singing-voice-synthesis, vocal-synthesis, speech-synthesis, vogen, openutau
Last push: 2026-08-24T01:14:22+00:00

## Health v2 (maintenance only)
Score: 70/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 15, longevity 100
- inputs: {"age_days": 4297, "days_push": 10, "days_rel": 353, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4231, forks 539 (observed 2026-08-28T04:08:39.448074+00:00)

## What it is
OpenUtau is a free, open-source singing voice synthesis editor and modern successor to UTAU, built for the UTAU voicebank community. It supports resamplers, phonemizers, and plugins, and runs on Windows, macOS, and Linux.

## Use cases
- create songs with synthesized singing voices
- use UTAU voicebanks in a modern editor
- make vocaloid-style music for free
- edit pitch and timing of vocal tracks
- synthesize singing from lyrics and melodies
- find an open-source UTAU alternative
- use DiffSinger AI voicebanks

## When to choose
- you want a free, actively maintained UTAU successor
- you need cross-platform support (Windows, macOS, Linux)
- you want modern UI, phonemizers, and plugin extensibility
- you work with UTAU or DiffSinger voicebanks

## When to avoid
- you need a full digital audio workstation (DAW) for mixing and mastering
- you require commercial vocal synth ecosystems like Vocaloid or Synthesizer V's paid features
- you need real-time live vocal synthesis

## Facets
- artifact type: application
- maturity: active
- function: audio-processing, speech-recognition, plugin-system, gui
- domain: media, entertainment, cross-platform
- platform: windows, cross-platform
- tags: singing-synthesis, utau, vocal-synthesis, vocaloid, music-production, diffsinger, voicebank, phonemizer, resampler, audio, macos, linux, desktop

## Member repositories
- openutau/OpenUtau (main) score 70

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:39.448074+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:22:20.513954+00:00, confidence not recorded.
  - readme: https://github.com/openutau/OpenUtau (fetched 2026-08-28T04:08:39.448074+00:00, sha 96cb8b3f9749)
  - homepage: http://www.openutau.com (fetched 2026-08-29T09:12:15.903331+00:00, sha 505ca76d5332)
- Data as of 2026-08-30T08:39:29.467469+00:00.