Etude No. 58 works out “slur two, tongue two” articulations as well as large leaps across a cascading series of arpeggios. The trickiest part about this study is centering a low note immediately after a rising sequence of arpeggios (see mm. 12-13, 16-17, etc.) For the rapid octave leap from g to g’, I like using the B-flat horn for the upper octave. It seems to help it pop out more accurately at the faster tempo. Tempo range in my edition is quarter note=88-112. My personal tempo for this video is quarter=88.