Muller's deep appreciation of fine craftsmanship and attention to detail comes from his many faceted background. He is a professional violist, a violin maker, an award winning sculptor and painter. Decades of hands on experience and familiarity with the "Gibson" Guarneri del Gesu, the concert instrument of Ruggiero Ricci for over 40 years, has been a major influence in his construction methods. Muller's friend and teacher, Louis Lionel Grand, was another guiding light in his violin making. The combination of all these influences has lead to what many call, "the incomparable sound" of Muller violins and violas. During the making process, he judges the arching and graduations of each instrument to complement the choice of wood, always adhering to the knowledge acquired from the great masters of Cremona.