This critical commentary focuses on the innovative pedagogical ideas of François Rabbath (b. 1931), an internationally acclaimed and self-taught double bass virtuoso and composer. There is particular focus on the left-hand techniques presented in Rabbath’s Nouvelle Technique de la Contrebasse (A New Technique for the Double Bass), published in four volumes between 1977 and 2012, which included translations in English, Spanish and German. The aim is to show how these techniques may be applied effectively to orchestral double bass repertoire in addition to solo repertoire for this instrument. First, the context for Rabbath’s work is established through a biographical overview as well as an introduction to his A New Technique. A comparison between Franz Simandl’s older and still widely-used Neueste Methode des Kontrabass-Spiels (New Method for the String Bass, 1874) and Rabbath’s A New Technique permits better understanding of the development and simplified nature of Rabbath’s approach. Discussion of each of Rabbath’s left-hand techniques helps clarify not only the correct way of executing these techniques, but also how to apply them in representative orchestral repertoire for the double bass. The objective overall in this critical commentary is to provide double bassists with more technical resources to incorporate into their playing and performance preparation, by means of a detailed examination of Rabbath’s left-hand techniques.