What is Radium used for?

Radium is a music editor and digital audio workstation that combines graphical editing with tracker-style text editing. It is a good fit for music composition and editing, audio recording and mixing, and MIDI sequencing.

Is Radium open source?

Yes. Radium is open source under the GPL-2.0 licence. Its source code is on GitHub at kmatheussen/radium and is written mainly in C++.

Yes. Radium is open source, so the software itself is free to use.

Can I self-host Radium?

Yes. Radium can be self-hosted on your own server or infrastructure.

What is Radium an alternative to?

Radium is an open-source alternative to REAPER. Other open-source alternatives to REAPER include Zrythm, LMMS and Ardour.

Is Radium actively maintained?

Yes. The most recent commit to Radium was on 13 October 2026. The project has 1.1k stars on GitHub.

Radium: open-source alternative to REAPER

About Radium

Radium is a music editor with a new type of interface that aims to make editing quicker and fit more musical data on screen compared to piano roll interfaces. It also includes a piano roll and allows graphical editing of note positions and effects, with text editing available like in a normal tracker.

Radium functions as a digital audio workstation (DAWg) for recording, editing, and mixing audio. It supports audio and MIDI multitracking, hard drive audio recording and playback, and various plugin formats including AU, LADSPA, LV2, VST, and VST3.

Key features

Audio and MIDI multitracker
Automate pitch, velocity, effects, and tempo
Granular synthesis
Optional piano roll
Global swing and swing-per-track
Modular mixer and/or mixer strips

Good fit for

Music composition and editing
Audio recording and mixing
MIDI sequencing

Built with: C++ tools
Tags: music editor; digital audio workstation; tracker; midi; audio; open source

Radium: questions and answers

What is Radium used for?: Radium is a music editor and digital audio workstation that combines graphical editing with tracker-style text editing. It is a good fit for music composition and editing, audio recording and mixing, and MIDI sequencing.
Is Radium open source?: Yes. Radium is open source under the GPL-2.0 licence. Its source code is on GitHub at kmatheussen/radium and is written mainly in C++.
Is Radium free?: Yes. Radium is open source, so the software itself is free to use.
Can I self-host Radium?: Yes. Radium can be self-hosted on your own server or infrastructure.
What is Radium an alternative to?: Radium is an open-source alternative to REAPER. Other open-source alternatives to REAPER include Zrythm, LMMS and Ardour.
Is Radium actively maintained?: Yes. The most recent commit to Radium was on 13 October 2026. The project has 1.1k stars on GitHub.