Hinzugefügte 2. Solostimme von Werner Richter-The Flautist's Progress (Der Fortschritt Im Flotenspiel) Op.33 Book 1 is an excellent collection of 15 pieces to be used as studies for Solo Flute composed by Ernesto Kohler.This is an additional second flute part to be played with the original studies to promote the pupil’s practical training of ensemble playing and to help the pupil overcome rhythmical difficulties.