div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: poster trombone dayBass Trombone of The Boston Symphony Orchestra Photo credit: Marco Borrgreve STH SOLO COMPETITION SPONSERED BY Group Warm-up Master Classes Participant Choir src=https:reader030fdocumentsnetreader030viewer20220409155e8d3b9df4009464d67e90efhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv