The proposed talk/workshop is nothing more than a follow-up to the tradition of LAC2013@IEM-Graz, LAC2014@ZKM-Karlsruhe and LAC2015@JGU-Mainz, as an informal hands-on demonstration to the most relevant issues and not so obvious ones of the Qstuff* software collection. Main subject though shall be Qtractor [4], an audio/MIDI multi-track sequencer project which also marks its return to Berlin where it was first announced (cf. LAC2007@TU-Berlin). Developers and users are kindly invited to discuss, complain and more importantly, exchange thoughts about the present and future of all this Qstuff*. The Qstuff* are, in order of appearance: :[1] QjackCtl - A JACK Audio Connection Kit Qt GUI Interface ::http://qjackctl.sourceforge.net ::https://github.com/rncbc/qjackctl :[2] Qsynth - A fluidsynth Qt GUI Interface ::http://qsynth.sourceforge.net ::https://github.com/rncbc/qsynth :[3] Qsampler - A LinuxSampler Qt GUI Interface ::http://qsampler.sourceforge.net ::https://github.com/rncbc/qsampler ::https://github.com/rncbc/liblscp :[4] Qtractor - An audio/MIDI multi-track sequencer ::http://qtractor.sourceforge.net ::https://github.com/rncbc/qtractor :[5] QXGEdit - A Qt XG Editor ::http://qxgedit.sourceforge.net ::https://github.com/rncbc/qxgedit :[6] QmidiNet - A MIDI Network Gateway via UDP/IP Multicast ::http://qmidinet.sourceforge.net ::https://github.com/rncbc/qmidinet :[7] QmidiCtl - A MIDI Remote Controller via UDP/IP Multicast ::http://qmidictl.sourceforge.net ::https://github.com/rncbc/qmidictl :[8] synthv1 - an old-school polyphonic synthesizer ::http://synthv1.sourceforge.net ::https://github.com/rncbc/synthv1 :[9] samplv1 - an old-school polyphonic sampler ::http://samplv1.sourceforge.net ::https://github.com/rncbc/samplv1 :[10] drumkv1 - an old-school drum-kit sampler ::http://drumkv1.sourceforge.net ::https://github.com/rncbc/drumkv1