OpenUTAU
Free open-source editor for UTAU and DiffSinger singing synthesis.
About
OpenUTAU is an open-source singing synthesis editor and the modern successor to the classic UTAU workflow. It loads USTX project files and drives multiple synthesis backends including classic UTAU resamplers, DiffSinger neural voices, and Vogen models, giving vocal-synth producers a single free workspace for tuning notes, phonemes, and expression.
The project is community-maintained on GitHub and has spawned a mobile port, OpenUtau Mobile, for Android and iOS. It remains the reference open tool for the fan-driven vocal synthesis scene, where creators share voicebanks and covers outside the commercial Vocaloid and Synthesizer V ecosystems.
What it can do
- USTX project editing with piano-roll tuning
- Multiple synth backends: UTAU, DiffSinger, Vogen
- Phoneme and expression parameter control
- Cross-platform desktop builds plus mobile port
Setup
Download the desktop build from the GitHub releases page.
Prerequisites
Windows, macOS, or Linux; a UTAU or DiffSinger voicebank.
Use cases
Works with
Trust score — 7/10
Scored 7/10 (metrics tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 100; Trending score 74/100 from researcher assessment.
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.