As a member of Theater Orchester Biel Solothurn, I wanted to give my little, personal contribution for these hard days: don't let the Music fall asleep!
Ciao! Have you already watched this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-hxbVExO1jOs.html ? Here and more extensively in this series I talk about improving the basics of trombone playing ;-)