What Is the DV Alto Saxophone Mouthpiece? Jody Espina has introduced the concept of Golden Section Proportions to the art of high end saxophone mouthpiece design. This perfect chamber/bore/facing combination will result in an extraordinary playing experience for you. Effortless Power & Beauty Here nature science and imagination combine to create a revolutionary new saxophone mouthpiece. Jody Espina has designed the JodyJazz DV (U.S. Patent No. 7 470 844) using proportions and principles found in nature. For the most effortless playing experience of your life we invite you to try the DV. Three Goals in Creating the DV Series of Saxophone Mouthpieces - To create the most efficient mouthpiece possible. That means that there are more harmonics present in the sound and therefore the projection of this Alto sax mouthpiece is huge. - To eliminate the annoying shrillness that is associated with loud bright metal alto saxophone mouthpieces. - To have a big fat midrange and bottom end that has never been present before in an alto mouthpiece with strong projection.