Revocalize AI vs Sinsy

Revocalize AI creates AI voices and trains custom voice models using voice-synthesizing technology. Its voice-conversion service captures a voice's harmonics and transforms an input voice into another. Listed tools include voice beautification and transformation, emotion, language versatility, real-time auto-pitch, vocal variations, and pitch, volume, and speed controls. Music creators can use the VST plugin for voice transformation, beautification, and harmonizing; compatible hosts named on the site include Logic Pro, Ableton, and FL Studio. Beta API documentation describes voice-to-voice conversion, text-to-singing, and speech, with access beginning by creating an account and API key. The site names sound engineers and producers, labels and publishers, artists and creators, and music enthusiasts and fans as use cases. Its Free plan includes 5 conversion minutes per month and one Starter AI voice. Starter costs $9 a month for 120 minutes and two Ultimate AI voices; Creator costs $39 a month for 300 minutes and five Ultimate AI voices. The VST plugin is listed for a 49.00 USD one-time payment. Exports include MP3 and WAV. Users are responsible for their uploaded or created content and may not create content that infringes others' rights.

Sinsy is a free web service that generates singing vocals from musical scores. You upload a MusicXML score, choose a vocal, and adjust settings labeled ALP, VIB, and PIT; Japanese appears as a language option. The system uses DNN- and HMM-based synthesis to model characteristics such as pitch and timbre, rather than accepting vocal input. Sinsy was developed by the Tokuda, Nankaku, and Hashimoto Laboratory. Its version history lists version 5.1 on 2026/05/01, with fixes for parameter-panel and smartphone/tablet behavior. Earlier entries record compressed MusicXML upload support in version 4.4 on 2023/12/25 and the addition of Japanese DNN vocal f01027j_dnn_beta5 in version 4.5 on 2024/12/25. The service is listed for web and Linux. Its Free online synthesis plan costs nothing. The synthesis page says using the service implies agreement to its terms of use. The about page is available in Japanese and describes the research background and version history.