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Qtractor 0.8.1 - The Sticky Tauon is out!

Hello everybody!

Qtractor 0.8.1 (sticky tauon) is out!

Release highlights:

  • JACK Transport mode switching on main menu/tool-bar (NEW)
  • Main menu Track/Navigate/Next, Previous wrap around (FIX)
  • Auto-backward play-head position flip-flopping (FIX)
  • JACK Transport tempo/time-signature in-flight changes (FIX)
  • Sanitized audio clip zoom-in/out resolution (FIX)

Obviously, this is one dot bug-fix release and everyone is then compelled to upgrade. On the side, a couple of notes are also worthy of mention...

Besides some other stray thoughts, you may be asking yourself, after reading those crappy release highlights above, what the heck that "in-flight" tempo / time-signature change-fix is all about?

No stress. There's always a reason, as if reason won't ever prevail, above all else...

So, the whole truth and nothing but the truth, should here be told: jack_link is the dang reason. And then, you may now know and play the badass with Ableton Link. Keep in mind that jack_link is kind of a toy, so please, have it under a child's perspective ;)

You can still play all along with your band fellows, don't get me wrong. You all have to be on the same machine or in the same local network segment (LAN) anyway, just like qmidinet does (and recommends). But that's probably one hell of a disparate story, although sharing the same networking concept... move along!

Whatever. When in doubt, please ask me. Whenever you find yourself in despair, you can also ask me. But take note that I made no promises nor guarantees that it would ever work for you. And this goes as far as in any formal disclaimer can go.

The hard truth is: your are on your own. But please, enjoy and have (lots of) fun while you're at it ;)

As second note, this project has finally called in for its own vanity and internet domain name: I guess it was about time.

Nuff said.

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 (help still wanted!):


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


  • The View/Options.../Display/Dialogs/Use native dialogs option is now set initially off by default.
  • All tempo and time-signature labels are now displayed with one decimal digit, as it was in mostly everywhere else but the time ruler/scale headers.
  • JACK transport tempo and time-signature changes are now accepted, even though playback is not currently rolling; also, changing (JACK) Timebase master setting (cf.View/Options.../General/Transport/Timebase) will take effect immediately, not needing nor warning for session restart
  • Track/Navigate/Next and Previous menu commands, finally fixed to wrap around the current track list.
  • Current session (JACK) transport mode option switching is now being made accessible, from the main menu and drop-down toolbar buttons, as well as user configurable PC-keyboard and/or MIDI controller shortcuts (cf. Transport/Mode/None, Slave, Master, Full).
  • Fixed some auto-backward play-head position flip-flopping, when opening a new session while the previous was still on rolling/playing state, hopefully.
  • Added French man page (by Olivier Humbert, thanks).
  • MIDI clip changes are now saved unconditionally whenever the editor (piano-roll) is closed or not currently visible.
  • Audio clip peak/waveform files re-generation performance, scalability and resilience have been slightly improved.
  • Some sanitary checks have been added to audio clip peak/waveform re-generation routine, as much to avoid empty, blank, zero or negative-width faulty renderings.
  • Do not reset the Files tree-view widgets anymore, when leaving any drag-and-drop operation (annoyingly, all groups and sub-groups were being closed without appeal).
  • Make builds reproducible byte for byte, by getting rid of the configure build date and time stamps.

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Enjoy && Keep the fun, as always.

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