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qpwgraph v0.6.1 - An End-of-Autumn'23 Release

Wholly Greetings!

qpwgraph v0.6.1 (end-of-autumn'23) released!


  • Introduce Help > Enable ALSA MIDI runtime option, now permitting to disable the ALSA MIDI/Sequencer graph conveniency in a whim.
  • Disconnect all pinned connections when patchbay is deactivated, subject to Patchbay > Auto Disconnect option.
  • Fix a potential port duplication when recycled under the same node and reusing a previous port id.
  • Don't unpin connections that are manually disconnected, when patchbay is deactivated and auto-pin is off.

Qtractor 0.9.36 - An Autumn'23 Release


Qtractor 0.9.36 (autumn'23) is released!


  • Multiple audio and/or MIDI files may now appear as arguments on the command line and get immediately imported into a new session; also, any audio or MIDI file may now be promptly imported into a new session from the main File/Open... dialog.
  • New MIDI clip tool option added: Rescale/Invert.
  • Introducing brand new MIDI clip tool: Tempo ramp.
  • Disable or better hide the Add Tracks option on the MIDI tracks export dialog.
  • Fixed a yearlong bug in MIDI file import/export of tempo, time and key signatures and markers, to severely wrong locations.
  • Enable Aux-Send inserts on output buses, but list possible target buses only; audio output buses are now listed as possible targets iif they follow or succeed the source one (in internal processing order).
  • Fixed MIDI tracks latency compensation, now working as expected.
  • Show current/total plugins latency on the Track properties dialog,
  • Fixed MIDI Step-input for non-zero offset clips.

qpwgraph v0.6.0 - An Autumn'23 Release


qpwgraph v0.6.0 (autumn'23) is out!


  • Improved Patchbay / Exclusive mode scan enforcement.
  • Hopefully fixes the hideous random crashes caused by very short lived nodes, recycled by reusing the very same ids.
  • Cope with nodes that can possibly remain with the very same name but different ids.
  • Added deactivated (-d, --deactivated) and non-exclusive patchbay (-n, --nonexclusive) command line options.
  • Fixed unique/single instance support (Qt >= 6.6).

Qtractor 0.9.35 - An End-of-Summer'23 Release batch #3

Hi, thrice again,

Qtractor 0.9.35 (end-of-summer'23) is out!


  • MIDI Step-input is now finally featured on the MIDI clip editor (aka. piano-roll), provided Clip/Record is on and playback is not rolling; current snap-to-beat applies; starts/resets to play-head; Edit/Insert/Step to advance a single step/rest.
  • Notes keyed in the MIDI clip editor's virtual piano keyboard may now be recorded, especially while "overdubbing".
  • The official VST3 plug-in SDK is now included in the source tree as Git submodules.
  • Fixed a rounding error on current BBT information passed to plugins and to JACK transport/timebase.
  • When on Track/Auto Deactivate mode, plugins now show a dull, dimmed lit, green (fake-)LED when in auto-deactivated state.
  • Attempt to actually (de)activate plugins once on (de)instantiation.
  • Preppings to next development cycle (Qt >= 6.6)


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 (severely outdated; help wanted!):


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

Keep having fun!

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Vee One Suite 0.9.32 - An End-of-Summer'23 Release batch #2

Hello, twice again,

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;
  • padthv1 a polyphonic additive synthesizer.

Are here released for the (northern) Spring'23 season...

All being delivered still in dual form:

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

The simplest change-log:

  • Preppings to next development cycle (Qt >= 6.6)


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