From one of the most prolifically published brass pedagogues of the twentieth century, Sigmund Herings 40 Progressive Etudes is recognized as an essential method, containing forty etudes that are perfect for the trumpet. Ideal for intermediate students, the etudes are organized in a progressive manner, challenging students as they improve. This revised edition contains MP3 recordings of all etudes performed by Grammy Award-winner Christopher Moore, Professor of Trumpet at Florida State University.

Author: Sigmund Hering (1899~1986)
Sigmund Hering was a graduate of the Royal Academy of Music, Vienna. Among his teachers were Rossbach (trumpet) and Schrecker (composition). Sigmund Hering was perhaps the most influential trumpet teacher in America during the mid 20th century, and was known worldwide. He served as trumpeter with the Philadelphia Orchestra from 1925-1964. He is the most published trumpet pedagogue in the world. 

Hering, Sigmund. 『Forty Progressive Etudes for Trumpet』. New York: Carl Fischer, 1945.