The Langey Practical Tutor for TromboneBass Clef The Otto Langey Tutors were "the" method books of the early 20th century. First published in the 1930s and still going strong! Otto Langey's classic tutors include helpful diagrams and illustrations, fingering charts and many studies and examples from standard repertoire, as well as exercises in ornamentation and passage work for the more advanced player.