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

Qtractor 0.9.19 - QStuff* Winter'20 Release batch #3

Season greetings, a third and last time,

Qtractor 0.9.19 (winter'20) is released!


  • Session directory auto-name option added to the session properties dialog, as convenience.
  • Loading and saving a LV2 plugin's state has been vastly improved. IMPORTANT CAVEAT: From this moment on wards, when loading any newer saved sessions into older versions of the program, all LV2 plugins won't get their state restored correctly.
  • Track colors saturation introduced as yet another eye-candy option (cf. View/Options.../Display/Track color saturation)
  • Fixed VST3 number of channels query/report.
  • Fixed immediate crash when loading untitled or unnamed Instrument Definitions files (*.ins): base file-name is now taken as default instrument definition name or title.
  • Tempo (BPM) entry may now be specified with arbitrary precision, to at most 3 decimal positions in fractional part, while integer whole values are displayed with no decimal point.
  • Added option to keep MIDI clip editor windows (aka. piano-roll) always on top of the main window (cf. View/Options.../General/Keep editor windows always on top).
  • MIDI clip editor status-bar labels are not stretched to whole text size anymore, most specially for the current file complete path.

Vee One Suite 0.9.19 - QStuff* Winter'20 Release batch #2

Season greetings, one second time!

Once more, the Vee One Suite of 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 here released for the (Northern) Winter'20 season...

All still delivered in the two traditional forms:

  • 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.

Changes for this special season release are as follows:

  • Better handling of the offset and loop ranges when in presence of very long sample files (applies to samplv1 and drumkv1 only).
  • Fixed display of old knob/dial values on status-bar.
  • Reduced formant filter coefficient slew rate, aiming to a tenfold DSP performance gain.
  • Get a chance on bringing Wayland into the picture when dealing Qt static-linked deliverables.

The QStuff* Winter'20 Release batch #1

Season greetings y'all,

The news are about this first batch of so called QStuff*, now being rolled out, seriously: QjackCtl, Qsynth, Qsampler, QXGEdit, QmidiCtl and QmidiNet, are all jumping straight and gloriously to version 0.9.0 for the (northern) Winter'20 Holiday season.

A more definitive and compelling tutorial

I just finished up a video tutorial covering the big topics related to Qtractor usage. I tried to make the case for Qtractor as a serious (perhaps best) choice for audio production on Linux. "THE Qtractor Tutorial" tracks a user through the process of choosing Qtractor in the first place, to downloading, through customization, routing and template making, through audio and midi recording, effects plugins and a wide variety of other important details that can get one more than merely 'started' on the software.


Qtractor 0.9.18 - A Fall'20 Release

Hi everyone,...

Qtractor 0.9.18 (fall'20) is out!


  • When under NSM, all top-level windows, main, mixer and connections, will always start hidden.
  • Plugin editors (GUIs) that are currently open on a track are now brought up as top-level windows immediately when a track is made current or highlighted (and Track / Auto Monitor is in effect).
  • MIDI clip editor mouse hovering effect extended to whole current note line on main view (piano-roll eye-candy++); also, the white keys on MIDI clip editor's virtual piano keyboard, are now fully highlighted.
  • Plugin search paths (View > Options... > Plugins > Paths) now lists all the default and actual existing paths, instead of a blank list.
  • Undimmed octave divider lines on the piano-roll.
  • Fixed potential crash on changing audio output buses channel count.
  • Note names display (inside note rectangles) are now an option on the MIDI clip editor (aka. piano-roll; menu View > Note Names).


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