Show-off my open-source stuff, mostly of the Linux Audio/MIDI genre

Qtractor 0.9.5 - A Valentines'19 Hotfix Release

Hello again,

Qtractor 0.9.5 (valentines'19 hotfix) is out!

Changes for this hot-fix release are as follows:

  • HiDPI display screen support (Qt >= 5.6; patch by Hubert Figuiere, thanks).
  • Fixed for DSSI plug-ins (eg. fluidsynth-dssi) loss of configuration state: clear internal config/state keys on release virtual method. (REGRESSION)
  • Fixed for NSM (and JACK) sessions not saving the correct file references/symlinks of clips that are recorded or created during the initial and scratch session.


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.

Qtractor 0.9.4 - The Winter'19 Release

Dear all,

Qtractor 0.9.4 (winter'19 beta) is released!

Changes for this season are as follows:

  • Drag-moving and copy-pasting existing clips, while over the main track-view, now shows the respective (audio wave-shapes and MIDI piano-rolls) graphical representations, as much as possible.
  • For good and bad, session name changes now trickle down to respective audio/MIDI file names as well.
  • Audio output monitoring meters may now be shown on MIDI tracks and buses as a default user preference option (View/ Options.../Plugins/Instruments/Show audio output monitoring meters) and also in plugin list context sub-menu (Audio/Meters).
  • Custom color (palette) themes can be exported to and imported from external files.
  • LV2 plug-in UI GTK2 and X11 in Qt5 host native support are now enabled on configure by default.
  • Fixed minimum input value as 10% (was 1%) for audio clip time-stretching in the Clip / Edit... dialog.

rtirq update - 2019 edition

Hello there!

Another year, another rtirq update:

  • Restart rtirq service after resume from suspend (by Térence Clastres).
  • Fix for some Intel internal and USB stuff (by Samuel Pelegrinello).
  • Version 20190129.

Home-brew packages are available here:


Again take note that the rtirq init-script/systemd-service makes sense only on real-time preemptive (PREEMPT_RT) or threadirqs enabled GNU/Linux kernels.

Cheers && Enjoy!

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QmidiCtl 0.5.3 - An Early Winter'19 Release

Happy New Year!

QmidiCtl 0.5.3 (early winter'19) is out!

QmidiCtl is a MIDI remote controller application that sends MIDI data over the network, using UDP/IP multicast. Inspired by multimidicast ( and designed to be compatible with ipMIDI for Windows ( QmidiCtl was long ago designed for the Maemo enabled handheld devices, namely the late Nokia N900 and promoted to the Maemo Package repositories. Nevertheless, QmidiCtl may still be found effective as a regular desktop application and recently as an Android application as well.

See also: QmidiNet - A MIDI network gateway via UDP/IP multicast.

Project page:

Git repos:

Change-log (since An(other) Early Summer'18 release):

  • Added proper display names to Command and Control Type entry fields on Configure dialog (ie. MIDI controller assignments dialog).
  • Old deprecated Qt4 build support is no more.
  • AppData/AppStream metadata is now settled under an all permissive license (FSFAP); also updated to be the most compliant with latest specification and recommendation.


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


Enjoy && have fun.

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Vee One Suite 0.9.4 - A Late Autumn'18 Release


The Vee One Suite of so called old-school software instruments, synthv1, as a polyphonic subtractive synthesizer, samplv1, a polyphonic sampler synthesizer, drumkv1 as yet another drum-kit sampler and padthv1 as a polyphonic additive synthesizer, are being released for the late in Autumn'18.

All still available in dual format:

  • a pure stand-alone JACK client with JACK-session, NSM (Non Session management) and both JACK MIDI and ALSA MIDI input support;
  • a LV2 instrument plug-in.

The changes for this special season are the following:

  • Make sure all LV2 state sample file references are resolved to their original and canonical file-paths (not symlinks). (applies to samplv1 and drumkv1 only)
  • Fixed a severe bug on saving the LV2 plug-in state: the sample file reference was being saved with the wrong name identifier and thus gone missing on every session or state reload thereafter.(applies to samplv1 only).
  • Sample waveform drawing is a bit more keen to precision.
  • Old deprecated Qt4 build support is no more.
  • Normalized wavetable oscillator phasors.
  • Added missing include <unistd.h> to shut up some stricter compilers from build failures.

The Vee One Suite are free, open-source Linux Audio software, distributed under the terms of the GNU General Public License (GPL) version 2 or later.


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