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. 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.
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.
Qtractor was simply the hobby project of one developer. Development was started on 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

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.