Drill commands in the context of "Marching band"

Voice projection is the strength of speaking or singing whereby the human voice is used powerfully and clearly. It is a technique employed to command respect and attention, such as when a teacher talks to a class, or simply to be heard clearly, as used by an actor in a theatre or during drills.

Breath technique is essential for proper voice projection. In normal talking, one may use air from the top of the lungs. A properly projected voice uses air flowing from the expansion of the diaphragm. In good vocal technique, well-balanced respiration is especially important to maintaining vocal projection. The goal is to isolate and relax the muscles controlling the vocal folds, so that they are unimpaired by tension. The external intercostal muscles are used only to enlarge the chest cavity, whilst the counterplay between the diaphragm and abdominal muscles is trained to control airflow.

Marching refers to the organized, uniformed, steady walking forward in either rhythmic or route-step time; and, typically, it refers to overland movements on foot of military troops and units under field orders. Marching is often performed to march music and is typically associated with military and civilian ceremonial parades. It is a major part of military basic training in most countries and usually involves a system of drill commands. It can also be used as a general term to describe a protest in which protestors move such as the March on Washington for Jobs and Freedom, a watershed moment in the civil rights movement.