DVD is NTSC, region free. Helmut Lachenmann presents a DVD release titled String Quartets. Helmut Lachenmann on the wonderful performers of the piece, Stadler Quartett: "Meeting and working with the musicians of the Stadler Quartett: one of my most precious memories and experiences - accuracy and euphony, even and especially in the 'extraterritorial' realm of noise and reverberations, and finally, along with their willingness to probe new performance techniques: inspired music-making and exquisite artistry. In short, everything needed to make an audience alert and attentive - and a composer happy. One cannot express gratitude, words are bound to fail." Sound format: PCM 2.0 Stereo. Picture format: 16:9. Total playing time: 76 minutes.