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Qtractor 0.7.0 - The Muon Base is out!


Stepping up to Summer'15 release frenzy stage scene, in its fourth and hopefully last act,

Qtractor 0.7.0 (muon base beta) is out!

Qtractor is an audio/MIDI multi-track sequencer application written in C++ with the Qt framework. Target platform is 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.

As a major highlight to this release, there's the advent of regular MIDI controllers mapping/assignment to main application menu command actions, just like normal PC-keyboard shortcuts, is being introduced (cf. main menu Help/Shortcuts...).

Have a hotta Summer'15 ;)



Project page:



Qtractor is free, open-source Linux Audio software, distributed under the terms of the GNU General Public License (GPL) version 2 or later.


  • Complete rewrite of Qt4 vs. Qt5 configure builds.
  • Revised MIDI Controlllers catch-up algorithm.
  • Mixer multi-row layout gets a little bit of a fairness fix.
  • Non-continuous MIDI Controllers now have their Hook and Latch options disabled as those are found not applicable,
  • As an alternative to PC-keyboard shortcuts, MIDI controllers are now also assignable and configurable for any of the main menu command actions, all from the same old configuration dialog (Help/Shortcuts...).
  • Fixed missing Track and Clip sub-menus from Edit/context-menu that were found AWOL ever since after the Lazy Tachyon beta release (> 0.6.6).
  • An off-by-one bar position (as in BBT, bar, beat and ticks) has been purportedly fixed as long as LV2 Time/Position atom event transfer goes.
  • French (fr) translation line to desktop file added (patch by Olivier Humbert, thanks).
  • A new top-level widget window geometry state save and restore sub-routine is now in effect.
  • Improved MIDI clip editor resilience across tempo and time-signature changes.
  • Keyboard shortcuts configuration (Help/Shortcuts...) now lists complete menu/action path where available.
  • Fixed in-flight VST plugin editor (GUI) resizing.
  • Added support to LV2UI_portMap extension, found really handy for the cases where you have multiple plugins with different port configurations and a single common UI to drive them all (pull request by Hanspeter Portner aka. ventosus, thanks).

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Enjoy && keep the fun.


Awesome. Thanks Rui.

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