High Quality Content by WIKIPEDIA articles! Qtractor is a hard disk recorder and digital audio workstation application for Linux. Qtractor is written in C++ and is based around the Qt4 library. Its author is Rui Nuno Capela, who is also responsible for the very widely used Qjackctl, Qsynth and Qsampler line of Linux audio software. Qtractor`s intention is to provide digital audio workstation software simple enough for the average home user, and yet powerful enough for the professional user.