Three different pressure plates. Whether playing classical or jazz, the Optimum Ligature’s three pressure plates accommodate your style. Plate n°1 : A rich, colorful sonority wich produces great resonance. Pressure along the fiber of the reed facilitates an unbelievable blowing ease. Incredible ease of articulation. Plate n°2 : A more compact, centered sonority smooth even sound extraordinary blowing ease. Plate n°3 : The reed vibrates in total freedom, producing a very flexible sound Greater ease of expression.