Qtractor is an Audio/MIDI multi-track sequencer application written in C++ around the Qt framework. The target platform will be Linux, where the Jack Audio Connection Kit (JACK) for audio, and the Advanced Linux Sound Architecture (ALSA) for MIDI,


  • Multi-track audio and MIDI sequencing and recording.
  • Developed on the Qt C++ application and UI framework.
  • Uses JACK for audio and ALSA sequencer for MIDI as multimedia infrastructures.
  • Traditional multi-track tape recorder control paradigm.
  • Audio file formats support: OGG (via libvorbis), MP3 (via libmad, playback only), WAV, FLAC, AIFF and many, many more (via libsndfile).
  • Standard MIDI files support (format 0 and 1).
  • Non-destructive, non-linear editing.
  • Unlimited number of tracks per session/project.
  • Unlimited number of overlapping clips per track.
  • XML encoded session/project description files (SDI).
  • Point-and-click, multi-select, drag-and-drop interaction (drag, move, drop, cut, copy, paste, paste-repeat, delete, split, merge).
  • Unlimited undo/redo.
  • Built-in mixer and monitor controls.
  • Built-in connection patchbay control and persistence (a-la QjackCtl).
  • LADSPA, DSSI, native VST and LV2 plug-ins support.
  • Unlimited number of plug-ins per track or bus.
  • Plug-in presets, programs and chunk/configurations support, including native VST FXB/FXP file support.
  • Unlimited audio/MIDI effect send/return inserts per track or bus.
  • Loop-recording/takes.
  • Audio/MIDI clip fade-in/out, cross-fade (linear, quadratic, cubic).
  • Audio/MIDI clip gain/volume, normalize, export.
  • Audio/MIDI track and plugin parameter automation (dynamic curves, sample&hold, linear and spline modes).
  • Audio clip time-stretching (WSOLA-like or via librubberband), pitch-shifting (via librubberband) and seamless sample-rate conversion (via libsamplerate).
  • Audio/MIDI track export (mix-down, render, merge).
  • Audio/MIDI metronome bar/beat clicks.
  • Unlimited tempo/time-signature map.
  • Unlimited location/bar markers.
  • MIDI clip editor (matrix/piano roll).
  • MIDI instrument definitions (a-la Cakewalk(tm) (*.ins)); SoundFont (*.sf2) and MIDI Names XML (*.midnam) files also supported.
  • MIDI controller mapping/learn/assignment (mixer and plug-in parameters).
  • MIDI system exclusive (SysEx) setups.
  • JACK transport sync master/slave.
  • JACK session support.
  • NSM (Non Session Management) support.
  • MMC control surface enabled.
  • MIDI Clock, Song Position cueing support.
  • Configurable keyboard and MIDI controller shortcuts.

Project Samples

Project Activity

See All Activity >

Follow Qtractor

Qtractor Web Site

Other Useful Business Software

Identify and respond to threats before damage is done Identify and respond to threats before damage is done Icon
Identify and respond to threats before damage is done Icon

A SIEM that makes it easy to use logs for security, compliance, and troubleshooting.

SolarWinds® Log & Event Manager (LEM) delivers comprehensive Security Information and Event Management (SIEM) capabilities in a highly affordable, easy-to-use, and quick-to-deploy virtual appliance. LEM provides the visibility, security, and control that IT professionals need to alert on and respond to security threats, and assist in meeting the regulatory compliance guidelines of HIPAA, PCI DSS, SOX, and more. Try it free for 30 days!

Rate This Project

Login To Rate This Project

User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5

User Reviews

  • An amazing DAW.

    1 user found this review helpful.
  • Best DAW I´ve used.

    2 users found this review helpful.
  • The author says its just a sequencer. I say it's a DAW :)

    2 users found this review helpful.
  • I used GNU / Linux to make music since around the time Jack was introduced. I spent coutless nights teaching myself how to use just about every single system available, and I always came back to Qtractor. Everything makes sense in Qtractor. And when it seems that it doesn't, a quick message on Rui Nuno's blog and you're out of the hole. The development is steady, focusing only on the core of the matter, and the result is a solid system, usable right now. Qtractor does not even try to be everything, it wants to be useful in the middle of the huge Linux audio production ecosystem, talking nice to everybody, implementing new techs & protocols silently, never breaking what's worked so far, bringing it all together. For me, it's the standard against witch I can compare everything else.

    2 users found this review helpful.
  • It seems a little silly to call it "alpha" software when it's more mature and usable than anything in it's category besides Ardour, but I guess the author has his reasons. Good choice of feature set while keeping things fairly simple.

    3 users found this review helpful.
Read more reviews >

Additional Project Details



Intended Audience

End Users/Desktop

User Interface

X Window System (X11), Qt

Programming Language