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Qtractor 0.9.23 - An Early-Summer'21 Release batch #3

Hello again, one third and last time...

But happy to announce yet another point release of, drum roll please...

Qtractor 0.9.23 (early-summer'21) is out!

Changes for this hot season are just but a few, nothing heartbreaking:

  • Dropped the 'Activate' option on the plug-in Selection dialog, now being as always on by default.
  • Have some tolerance for JACK buffer-size changes, only prompting to a complete session reload, if increasing in double the initial period size.
  • Introducing plug-in blacklisting, on user discretion (in View/Options.../Plugins/Blacklist) and on inventory scan (crashed plug-ins are now automatically blacklisted).
  • Added special support for LV2 UI GTK2 plugins based on Gtkmm 2.4 framework.
  • All builds default to Qt6 (Qt >= 6.1) where available.
  • CMake is now the official build system.


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:

Wiki (outdated; help wanted, please):


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

Keep the fun && Stay safe, always!

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yPhil's picture

Hi, rui Nuno! I've been trying to Download the Appimage file for a while now, it stalls, then downloads a few Ks (the DL metrics are totally off) then stalls, then sometimes fails :/ I managed to DL qjackctl though, same deal but it finally arrived after like 20 minutes..? Anyway, just so you know. Thanks a lot for this release, I can't wait to try it ; My config file spawned several versions, I hope it won't break anything ;)

rncbc's picture

well, they certainly aren't like so here, at least from this party or end of the intertubes:)
they all download just fine here.

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