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QjackCtl 0.3.4 Patchbay Snapshot Revamp

A semester has gone by, since last release, with no big news on this front. Alas, on the verge of the coming one-dot-oh release of the mighty JACK Audio Connection Kit, here goes one fine update of its old and aged Qt GUI front-end:

QjackCtl 0.3.4 is out!

Nothing much new to see but you might welcome the patch-bay snapshot revamp, which might finally do the right thing, and the rand new translations that are getting in place: German (de), Spanish(es), French (fr) and Russian (ru). Many thanks to all involved.

With no further ado, the good stuff is ready from the usual places.


Project page:



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


  • Introducing the very first and complete translations in-package: German (de), Spanish (es), French (fr) and Russian (ru); credits in TRANSLATORS.
  • At last, after years of retarded procrastination, the old infamous patchbay snapshot feature has been the subject of a almost complete rewrite and it does try to give a way better mapping of all actual and current running client/port connections, both JACK (audio, MIDI) and ALSA MIDI, of course ;)
  • On Setup/Settings/Parameters dialog, all device selection options are now reset to default when disabled interactively.
  • Grayed/disabled palette color group fix for dark color themes.
  • Qt Software logo update.
  • Fait-divers: desktop menu file touched to openSUSE conventions.
  • ALSA PCM devices now only listed/enumerated iif strictly compliant with the audio mode criteria (Duplex, Capture-only or Playback-only) as kindly suggested by Nedko Ardaunov.
  • JACK client/port aliases may now be displayed as a global user option (see Setup/Display/Connections/JACK client/port aliases).
  • Lighten up the connections line and highlight colors, as seen to fit best on some darker background themes.
  • Patchbay snapshot fixed to differentiate socket clients according to its type (Audio, MIDI or ALSA-Seq), avoiding the mess and gross mistake of hanging disparate type ports under the same client item.
  • JACK_DEFAULT_SERVER environment variable is now appended to the X11 unique application identifier, allowing for having multiple instances each controlling its own JACK server, besides the default one.
  • Due to some trouble with newer Qt >= 4.4 applications regarding font size configuration, a new global user option is now available to the rescue: Setup/Misc/Defaults/Base font size (default is no-op).

Cheers && Enjoy.


this is great. such an interesting software for me to use. thanks for the info. now i could improve my system.

this is an interesting audio application. I will explore this software for use with my lyrics site.

Very useful website, wants to see much more on it! Go on!

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