Sinsy
Sinsy: A free, focused option for generating multilingual vocals from MusicXML scores. Ranked #20 of 25 in AI Singing Voice Generators by our editors (7.1/10); pricing: Free plan; best for free multilingual browser-based synthesis.
At a glance
- Editor score7.1 / 10
- PricingFree plan
- Best forFree multilingual browser-based synthesis
- Free planYes
- Paid fromFree
- Founded2009 · Nagoya, Aichi, Japan
- Facts checked20 Sep 2026
Where it wins
- Free access with no paid plan requirement
- Supports Japanese, English, and Mandarin lyrics
- Offers voice, character, vibrato, and pitch controls
Where it doesn't
- Requires MusicXML score files rather than vocal input
- Workflow is limited to web and Linux platforms
- Focused on score-driven synthesis rather than broad production tools
Our verdict on Sinsy
Sinsy is an online singing voice synthesis system for composers, researchers, educators, and developers working from musical scores. It generates singing vocals from uploaded MusicXML files and supports Japanese, English, and Mandarin lyric input. Selectable singing voices, gender-like vocal character, vibrato intensity, and pitch shifting in semitone increments give users control over the generated result. Its HMM- and DNN-based synthesis approaches make it a focused tool for exploring AI-assisted singing from structured score data.
The product’s strongest practical advantage is its free model. Sinsy provides browser-based synthesis without requiring a paid tier, and it also supports Linux. Compressed MusicXML files are supported, which suits projects that already organize musical notation in score files. The language coverage is useful for multilingual work, while selectable voices and adjustable vocal character provide more control than a fixed-output generator. The workflow remains centered on uploaded MusicXML, so it fits score-led composition and research better than projects that begin with recorded vocals or free-form vocal input.
Sinsy’s feature set is deliberately narrow: it focuses on converting musical scores and lyrics into singing vocals rather than presenting a broad production environment. Pitch shifting, vibrato, and vocal-character controls add useful shaping options, but the platform choices remain web and Linux. Choose Sinsy if free, multilingual, score-driven synthesis is the priority, especially for composition, education, or experimentation with singing-voice systems. Consider another tool if your workflow depends on direct vocal input, a wider platform range, or a more expansive production feature set.
Your product? Our editors can test Sinsy in depth and publish a review, labelled as paid · from $149/mo →
Sinsy pricing
Sinsy fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Voice cloning | Not verified |
| Vocal input | No |
| MIDI support | Not verified |
| Stem export | Not verified |
| Supported languages | Not verified |
| Export formats | Not verified |
| Commercial use | Not verified |
| Deployment | Cloud, Self-hosted |
| Platforms | Web, Linux |
| Support | Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | sinsy.sp.nitech.ac.jp |
| Facts checked | 20 Sep 2026 |
Alternatives to Sinsy
- LyricToMelody AIA broad songwriting workspace for building vocal drafts, arrangements, and DAW-ready exports.9.4
- Synthesizer V Studio 2 ProA focused desktop tool for precise editing of synthesized vocals.9.2
- ACE StudioA broad desktop toolkit for AI singing generation, cloning, conversion, and vocal editing.9.0
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Featured on iTechGuides
Sinsy is listed in our AI Singing Voice Generators directory. Add the badge to your site — it links back to this page.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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