Here’s the latest installment in the Kopprasch Project, No. 38, which is primarily a study in legato scales. Suggested tempo in my edition is dotted quarter=116-144, although I topped out around dotted quarter=126-132. *Note: In many editions this study is notated in 4/4 time with triplets. The edition I am using for the second half of this project is by Cornopub, and is notated in 12/8. Not sure if there is any advantage to one over the other.
One other point of interest with this etude is that it is on the Texas Music Educators Association All-State Audition list for 2012-2013. In fact, all three of the etude selections for TMEA this year come from Kopprasch, including No. 21, No. 38, and No. 46. The TMEA etude selection committee has put together a very helpful performance guide. Their suggested tempos are quite virtuosic, but certainly playable. Horn player and teacher Ryan Palmer has recorded some great videos demonstrating these three etudes (No. 21, No. 38, and No. 46)