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Software · Audio & music

Qtractor

An Audio/MIDI multi-track sequencer.

  • Completely free
  • Linux
  • Open source

Overview

Features described in its Flathub listing, in its GitHub repository and on its official website: MIDI support, multitrack editing, audio plugins (VST, LV2…), plugins and add-ons.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Qtractor is an Audio/MIDI multi-track sequencer application written in C++ with the Qt framework.” — official website, 10 November 2026
  • “Qtractor is an Audio/MIDI multi-track sequencer application written in C++ with the Qt framework.” — official website, 10 November 2026
  • “LADSPA , DSSI , native VST(2), VST3 , LV2 and CLAP plug-ins support.” — official website, 10 November 2026
  • “LADSPA , Linux Audio Developer's Simple Plugin API http://www.ladspa.org/” — official website, 10 November 2026

At a glance

All of Qtractor is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-2.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

Qtractor is an Audio/MIDI multi-track sequencer application written in C++ around the Qt framework using Qt Designer. The initial target platform will be Linux, where the Jack Audio Connection Kit (JACK) for audio, and the Advanced Linux Sound Architecture (ALSA) for MIDI, are the main infrastructures to evolve as a fairly-featured Linux Desktop Audio Workstation GUI, specially dedicated to the personal home-studio.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
  • Last technical check: 7 November 2026
  • Description from Flathub — AppStream (Flathub)

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