 While this technique was described in written form within the first brass instruction books published in France in the late 1800s, as well as some American trumpet method books from the early 20th century, the instructions were mistranslated by subsequent generations of teachers, altering the trajectory and quality of brass playing and instruction for the past 100 years.Callet subsequently began creating and manufacturing his own line of trumpets and mouthpieces, for he believed that most modern trumpet equipment was designed to compensate for the failures of modern trumpet playing and teaching.Born April 24, 1930 in Pittsburgh, Pennsylvania, Callet began his trumpet studies at age thirteen after being inspired by two fellow students, Cal Massey and Tommy Turrentine, at Herron Hill Junior High School in Pittsburgh.