qrq - yet another CW trainer (Linux, Unix, OS X, Windows) qrq is an open source Morse telegraphy trainer which runs on several operating systems (Linux, Unix, OS X and Windows), similar to the classic DOS version of Rufz by DL4MM. The script now builds with PulseAudio support. If OSS support is desired, the option 'USE_PA=NO' will need to be appended to the make command (see comment in qrq.SlackBuild) before the package is built.