Qtractor

Qtractor is a hard disk recorder and digital audio workstation application for GNU/Linux. Qtractor is written in C++ and is based on the Qt framework. Its author is Rui Nuno Capela, who is also responsible for the Qjackctl, Qsynth and Qsampler line of GNU/Linux audio software.[2] Qtractor's intention was to provide digital audio workstation software simple enough for the average home user, and yet powerful enough for the professional user.

Qtractor
Qtractor
Developer(s)Rui Nuno Capela
Stable release
0.9.19[1] / 20 December 2020 (20 December 2020)
Repository
Written inC++ (Qt)
Operating systemGNU+Linux
Available inEnglish, French, Portuguese, Spanish, Italian, German, Czech, Russian, Japanese
TypeDigital audio workstation
LicenseGNU General Public License
Websiteqtractor.org

Released under the terms of the GNU General Public License, Qtractor is a free and open-source software application.

Overview

Qtractor is a non-destructive digital audio and MIDI multi-track composition sequencer and arranger software application. It does not affect, alter or modify the audio and/or MIDI files that are displayed as Clip Objects. Exceptions are files resulting from capture and recording operations or from explicit changes made through specialized Clip editing (e.g., MIDI Editor).

Qtractor was simply the hobby project of one developer. Development was started in April 2005, initially as a Qt3 application. Since October 2006, it is officially a Qt4 application. Meanwhile, it can be built against Qt5.

Qtractor is natively hardwired and exclusive to the JACK Audio Connection Kit infrastructure, and the ALSA sequencer for MIDI. It is a GNU/Linux-only application.

Features
  • Supports all sample rates, only restricted by hardware.
  • Supports multiple audio file formats, both compressed and uncompressed, including older formats such as 8SVX and .iff.
  • Clip editing and automatic or manual Time Stretching abilities.
  • Supports most major audio and MIDI file formats and most GNU/Linux plugin technologies.
  • Clips may be easily edited by dragging the left or right edges for cropping, or even for timeshifting, by using the shift key modifier.
  • Qtractor may be used in an audio mastering environment. Its integration with JACK makes it possible to use mastering tools such as JAMin to process the audio data.
  • Qtractor has both an audio and MIDI metronome with user selectable audio samples.
  • Easily move and copy plugins (with params) among tracks.
  • Keyboard commands (hotkeys) are entirely customizable.
  • Audition audio files within the Files dialog.
  • Built-in Qjackctl Connections dialog.
  • Supports LADSPA, DSSI (this includes DSSI-VST wrapper), native GNU/Linux VST and LV2 plugins.

Compatibility

Qtractor relies on plugins to enable many features from audio effects processing to dynamic control. Qtractor supports the LADSPA plugin architecture, as well as DSSI, native GNU/Linux VST and LV2. Support for Steinberg's VST plugin standard with Wine is available using the DSSI-VST wrapper. Qtractor stores these connections, and re-establishes them when a project is reloaded.

See also

References
  1. "Release 0.9.19". 20 December 2020. Retrieved 1 January 2021.
  2. Dave Phillips (28 August 2006). "HDRs and DAWs For Linux: The New Breed". Linux Journal. Retrieved 20 August 2019.
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