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Qtractor 0.9.39 - A Winter'24 Release batch #3

Hi there, twice again!

Now making up the QStuff* third batch of the New Year...

Qtractor 0.9.39 (winter'24) is out!

Maybe, just maybe--no promises here whatsoever--this could be very well be the last before the unthinkable 🐱?


  • Added build checks on whether to use old or newer style of LV2 include headers.
  • Introducing new Transport/Step/Backward and Forward menu actions, to move the play-head backward and forward, in bar/beat/fraction (snap-per-beat) steps, respectively.
  • Introducing View/Options.../Display/Custom/Style sheet (*.qss) application themeing option.
  • Improved MIDI clip editor centering to current mouse pointer position in main timeline (tracks-view); on both horizontal and vertical axes.
  • LV2 Plug-in Control Input Port-change request extension feature support added.
  • Fixed an old one-off plug-in parameter change command aliasing (undo/redo).
  • Updated copyright headers into the New Year (2024).


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.


Project page:


Git repos:



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

Cheers && Keep the fun!

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