Typically this is why marching band field arrangements put the drumline in back. The drumline plays with the conductor's hands, and everyone else plays with the

Typically this is why marching band field arrangements put the drumline in back. The drumline plays with the conductor's hands, and everyone else plays with the beat of the drumline as it travels forward towards the audience, therefore arriving synchronized to the audience. Drumline hears everyone else as dragging, brass thinks the woodwinds are dragging, but it all works out from the perspective of the audience.