Freedom251 › AI Singing Voice Generators

Sinsy

Free plan LinuxWeb

What Sinsy is

Sinsy turns musical scores into synthesized singing vocals. Upload a MusicXML score through its web page, then choose a vocal and adjust the settings labeled ALP, VIB, and PIT. Japanese is shown as a language option, and the service does not accept vocal input. Its singing voice synthesis uses DNN- and HMM-based methods to model characteristics such as pitch and timbre. The system was developed by the Tokuda, Nankaku, and Hashimoto Laboratory. Its version history lists version 5.1 on 2026/05/01, with fixes to the parameter panel and smartphone and tablet behavior. Earlier updates added compressed MusicXML upload support in version 4.4 on 2023/12/25 and the Japanese DNN vocal f01027j_dnn_beta5 in version 4.5 on 2024/12/25. Sinsy is listed for web and Linux, and its Free online synthesis plan costs nothing. The about page, which describes its research background and version history, is available in Japanese. The synthesis page says that generating vocals implies agreement to the site's terms of use.

Who it suits

It suits people who want to generate singing vocals from MusicXML scores and adjust vocal settings. Users should note that vocal input is not accepted and the about page is in Japanese.

What it does well

Free online MusicXML-to-vocal synthesis.
Offers vocal selection and ALP, VIB, and PIT settings.
Japanese is a listed language option.
Supports compressed MusicXML uploads.

What to know first

Does not accept vocal input.
The about page is available in Japanese.

Plans

Plan	Billed and limits	Price
Free online synthesis	Uploads a MusicXML score to generate singing vocals	Free

As sinsy.sp.nitech.ac.jp lists them, read 8 Oct 2026. The maker's own page has the final word.

Getting started

Open the Sinsy website.
Upload a score file in MusicXML format.
Choose a vocal and adjust the ALP, VIB, and PIT settings.
Use the synthesis service in accordance with its terms of use.

Verdict

Sinsy provides score-based vocal synthesis with selectable vocals and adjustable settings. Before using it, note that synthesis implies agreement to the site's terms.

Questions

How much does Sinsy cost?

The Free online synthesis plan is listed as free.

What input does Sinsy accept?

The web page accepts a score file in MusicXML format. It does not take vocal input.

Which platforms are listed for Sinsy?

Sinsy is listed for web and Linux.

Which language can I select for synthesis?

Japanese appears as a language option in the current synthesis settings.

Who developed Sinsy?

The Tokuda, Nankaku, and Hashimoto Laboratory developed Sinsy.

What should I know before synthesizing vocals?

The synthesis page says that synthesizing vocals implies agreement to the site's terms of use.

Facts from Sinsy's own pages

About page language: The opened about page is available in Japanese and describes Sinsy's research background and version history. · sinsy.sp.nitech.ac.jp, 8 Oct 2026
Compressed files: The version history says compressed MusicXML upload support was added in version 4.4 on 2023/12/25. · sinsy.sp.nitech.ac.jp, 8 Oct 2026
Current version history: The about page lists version 5.1 on 2026/05/01 and says it fixed parameter-panel and smartphone/tablet behavior. · sinsy.sp.nitech.ac.jp, 8 Oct 2026
Development: The about page says Sinsy was developed by the Tokuda, Nankaku, and Hashimoto Laboratory. · sinsy.sp.nitech.ac.jp, 8 Oct 2026
Founded: 2009 · sinsy.sp.nitech.ac.jp, 28 Sept 2026
Headquarters: Nagoya, Aichi, Japan · sinsy.sp.nitech.ac.jp, 28 Sept 2026
Input format: The web page accepts a score file in MusicXML format. · sinsy.sp.nitech.ac.jp, 8 Oct 2026
Languages: The synthesis settings on the current web page show Japanese as a language option. · sinsy.sp.nitech.ac.jp, 8 Oct 2026
Purpose: Sinsy generates singing vocals from musical scores using DNN- and HMM-based synthesis. · sinsy.sp.nitech.ac.jp, 8 Oct 2026
Recent vocal addition: The version history says Japanese DNN vocal f01027j_dnn_beta5 was added in version 4.5 on 2024/12/25. · sinsy.sp.nitech.ac.jp, 8 Oct 2026
Site terms: The synthesis page says that synthesizing vocals implies agreement to the site's terms of use. · sinsy.sp.nitech.ac.jp, 8 Oct 2026
Synthesis method: The about page says the system uses DNN- and HMM-based singing voice synthesis to model characteristics such as pitch and timbre. · sinsy.sp.nitech.ac.jp, 8 Oct 2026
Vocal control: The page provides settings labeled ALP, VIB, and PIT alongside vocal selection. · sinsy.sp.nitech.ac.jp, 8 Oct 2026

Where Sinsy stands on Freedom251

AI Singing Voice Generators#13 of 25