While listening to the finals of Radio 2’s Young Brass Soloist competition I was reminded of a problem that sometimes afflicts brass bands: trombones out of sync with the rest of the band. It doesn't only affect lower grade bands but I was surprised on this occasion to hear it marr the performance of the mighty Black Dyke band at times. I’m not sure there’s just one reason for it. Could it be due to the extra physical effort required in changing notes with a slide rather than valves?:sup Do trombone players have more difficulty than others from seeing the conductor’s beat? Could the size of a trombone bell fractionally delay the sound of the cornets sitting opposite reaching the players' ears? Are trombone players mentally in another room? Does anyone have any ideas? Serious if possible!