README.md
August 23, 2026 · View on GitHub
Helio is a free and open-source music sequencer for desktop and mobile platforms:
This project is an attempt to rethink a music sequencer: prefer uncluttered, distraction-free UI, aim for clear over clever, and encourage experimentation in underexplored areas in music, like exotic scales and microtonal temperaments.
Getting started
The latest builds can be found at helio.fm.
Check out the documentation to get started, or see this YouTube channel for some showcases.
Building
| AppVeyor | Travis CI | |
|---|---|---|
| master |  | |
| develop |  |
Packaging status
Support the project
License and credits
GNU GPL v3 © Peter Rudenko and contributors, see LICENSE for details.
App icon by Valery Davletbaev, distributed under CC-BY. Other icons from various free icon fonts are licensed under SIL Open Font License and CC-BY.
Built-in metronome sounds are recorded by Ludwig Peter Müller, CC0.
The built-in SoundFont player instument is based on SFZero, written by Steve Folta and extended by Leo Olivers and Cognitone.
The built-in scripting language is based on a Lisp interpreter by Adam McDaniel.
All documentation, translations and logotypes are distributed under CC-BY.
Translation and proofreading
Afrikaans - Jacques Viviers
Chinese - Bowen Sun, Yingchun Soul
German - Aninsi Sasberg
Greek - Pavlos Mavromatis
Italian - Claudio Stano, Riccardo Cariboni
Japanese - Kotone Itaya
Korean - YoungGwang Jeon, DaYeon Lee, HyoHee Jeon
Polish - Dawid Bugajski
Portuguese - Dario Silva, Daniel Leandro
Turkish - Yusuf Çakar
Ukrainian - Denys Nykula
Vietnamese - Dat T.The
You can help proofread and improve the translation for your native language here.