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Qtractor 0.9.0 - An Early Spring'18 Release


Qtractor 0.9.0 (early spring'18 beta) is now released!

The change-log for this spring-time release goes as follows:

  • New View/Options.../Plugins/Experimental/Show plugins on track list/left pane option is in effect on tracks that are tall enough in height for their plugins list to fit on the Bus column.
  • Fixed a day-zero bug over the MIDI Insert (Send/Return) pseudo-plugin, which was duplicating MIDI events onto the next LV2 plugin in chain, causing strange hanging notes, mutes, retriggerings and what not.
  • MIDI track and clip note min/max range display now fixed.
  • MIDI Program Change events (PC) now have their proper program number as parameter, instead of value, on the internal MIDI event representation.
  • Merging MIDI clips while on SMF Format 0 has been fixed: was merging always onto the same MIDI channel (2), most often the wrong one, resulting in an empty or blank clip.
  • When importing from standard MIDI files (SMF), set track names from Mtrk TRACKNAME meta-events instead of filename.
  • Avoid asking to save as to existing or just newly created clip file-names, whenever possible.
  • Disable singleton/unique application instance setup logic when the display server platform is not X11.
  • Whether to use native file browser/requester dialogs is now an effective option when launching under NSM session management (was once disabled initially).
  • Content files are now saved as symlinks when saving to JACK and/or NSM session directories/folders.
  • Trying to get CC14 MSB+LSB (course+fine) running status on, no matter whether each pairing event are under 200ms apart.
  • Possible VST plug-in GUI reparenting hack/fix on Qt5/Xcb.


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 wanted, always!):


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

Enjoy && Keep the fun. Always.

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Thanks for the wonderful new release.

I compiled and build Qtractor (off github) on Linux Mint 18.3:

sudo apt-get install make automake g++ qt5-default libjack-jackd2-dev jackd2 qjackctl alsa-base libclalsadrv2 pulseaudio-module-jack libasound2-dev libsndfile1-dev lame libmad0-dev libsamplerate0 libsamplerate0-dev lv2-dev lv2-dev liblilv-dev libqt5x11extras5-dev qttools5-dev-tools


cd qtractor
sudo make install

WORKS: and I'm using it everyday for production.

BUG: There is a bug on Import Tracks -> MIDI where the dialog box only shows lowercase *.mid files and the dropbox shows no option to select any (*) file.

Where do I report bugs?

rncbc's picture

whoa, you really have all those files from ancient times haven't you? probably directly sent way back from a MSDOS era? ;)

nevermind. although not a terrible show-stopper bug--you can always workaround and backup/rename your files with the lowercase suffixes, if you will--you can report bugs here, on project page or even as an issue on please yourself!


[UPDATE:] Fixed: - Added "All files (*.*)" filter to every file requester dialog, wherever missing. >=

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