for the Trombone Discord Etudes and Challenges - and on different mouthpieces! Links to other videos for comparison below:

Hammond Witser
   • Bitsch #2 with Hammond-Witser  

Doug Elliot XT 104 XT G* G8
   • Bitsch #2 with Doug Elliott XT 104 XT...  

Laskey-Alessi 55SMYPH
   • Bitsch #2 with Laskey-Alessi 55SYMPH  

Griego-Alessi 1D
   • Bitsch #2 on Griego-Alessi 1D