
Open-source desktop AI music composer that writes editable chords, melody, bass and drums into a piano roll from plain-language prompts.
Open-source desktop AI music composer that writes editable chords, melody, bass and drums into a piano roll from plain-language prompts.
Tonefold (formerly FLVSTX) is a free, GPL-3.0 desktop app for macOS and Windows that composes music from natural-language descriptions. It writes chords, melody, bass and drums as plain notes on separate layers and sections in a piano roll, plays them instantly through a built-in General MIDI synth, and lets you edit any note. A Producer mode proposes a plan that you approve before four specialist agents write their own layers. The chat composer runs on your own Claude login via Claude Code or a local Ollama model, while generation, editing and export work offline.

Open-source desktop AI music composer that writes editable chords, melody, bass and drums into a piano roll from plain-language prompts.
Tonefold works by combining Layered Composer: Writes chords, melody, bass and drums on separate layers and sections, with eleven layer kinds., Editable Piano Roll: Every generated part is plain notes you can draw, move and resize, with velocity and drum lanes., Producer Mode: A producer agent proposes a plan and nothing is written until you approve it; four specialists then write only their own layers., Built-in Synth Playback: A General MIDI synth plays the song immediately, before choosing instruments., Flexible Export: Exports MIDI, a stereo WAV mix and one WAV stem per layer. to help users with Song Sketching: Describe a mood and genre to get a full multi-layer draft in minutes., MIDI Production: Export generated parts as MIDI into a DAW for further arrangement., Stem Creation: Render one WAV per layer for mixing elsewhere., Learning Composition: Inspect and edit the notes of generated chords and melodies to learn structure., Agent-Driven Composing: Let Claude Code or Codex compose through the CLI and skill file..
Key features include Layered Composer: Writes chords, melody, bass and drums on separate layers and sections, with eleven layer kinds., Editable Piano Roll: Every generated part is plain notes you can draw, move and resize, with velocity and drum lanes., Producer Mode: A producer agent proposes a plan and nothing is written until you approve it; four specialists then write only their own layers., Built-in Synth Playback: A General MIDI synth plays the song immediately, before choosing instruments., Flexible Export: Exports MIDI, a stereo WAV mix and one WAV stem per layer..
Tonefold is useful for anyone interested in Song Sketching: Describe a mood and genre to get a full multi-layer draft in minutes., MIDI Production: Export generated parts as MIDI into a DAW for further arrangement., Stem Creation: Render one WAV per layer for mixing elsewhere., Learning Composition: Inspect and edit the notes of generated chords and melodies to learn structure., Agent-Driven Composing: Let Claude Code or Codex compose through the CLI and skill file..
Tonefold is free to use.
Visit https://tonefold.vkfolio.com/ to sign up and explore Tonefold.
Browse by use case: Voice & Audio
Compare Tonefold: vs NOVA CLI · vs Unprompt · vs Velozity · vs Thalia