Holon.ist alternatives

Symphonia is a music-making app that enables you to compose music only with your voice, without playing any instrument. You just need to sing a melody and Symphonia automatically detects what you sing and transforms it into beautiful instruments instantly.

An open-source, easy-to-use music notation editor that lets anyone compose together in real-time. Just go to composing.studio in your browser, create a new session, and share the link with other musicians! No setup or installation needed.