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Helio is a free and open-source music sequencer for desktop and mobile platforms:

On desktop (Windows)

On smartphone (Pixel 6a)

On tablet (iPad mini)

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

Basic build instructions

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Packaging status

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.

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