Musical analysis and technical studies of Alexey Konstantinovich Lebedev's "Concerto No: 1" and "Concert Allegro" for tuba - bass trombone

İn this study, the first examples of the trombone in history and how it emerged are mentioned, and the development of the bass trombone in this process is given. In particular, it is mentioned how the modern bass trombone was shaped in line with the requirements of 20th century music and art. Also in this study, the life of Russian composer and Tuba player Alexey Konstantinovich Lebedev, who is known for the whole world in the field of brass instruments with his "Concerto No.1", is briefly mentioned. The musical analysis of the composer's "Concerto No: 1" and "Concert Allegro", which has an important role in the tuba and bass trombone repertoire, are made and also suggestions are given about the playing techniques of the works on the bass trombone.