"Qtractor is an Audio/MIDI multi-track sequencer
application written in C++ with the Qt4 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."
Qtractor is free, open-source software, distributed
under the terms of the GNU General Public License
(GPL) version 2 or later.