Callet rediscovered the original brass embouchure technique utilized in Europe during the baroque era, which at the time was only passed on verbally from trumpet guild members to their sons, and subsequently, by the great classical and jazz players of the first half of the 20th century.
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.
Although he subsequently studied with several well known and accomplished trumpet instructors in the Pittsburgh area and dedicated himself laboriously to mastering the instrument, by the age of thirty Callet could still not play a high C. In 1947, after many years of struggle, Callet began researching the physical elements necessary to develop a "Super Power Embouchure", such as those developed by players such as Harry James, Charlie Shavers, Horst Fischer, Maurice Andre, and Maynard Ferguson.
The Superchops embouchure methodology eventually led him on the quest to design and produce the best trumpets and mouthpieces available.
Callet also conducted brass embouchure clinics in the United States, Canada, Germany, Finland, Switzerland, France, Denmark, Hungary and Japan.