Here is a video showing VMPK's MIDI input in action.

The music is played by MuseScore () and rendered by QSynth () and QJackCtl () and finally recorded with recordMyDesktop ()

  : http://www.youtube.com/watch?v=f_jlej7cnQA
  : https://sourceforge.net/projects/mscore/
  : https://sourceforge.net/projects/qsynth/
  : https://sourceforge.net/projects/qjackctl/
  : https://sourceforge.net/projects/recordmydesktop/