The center channel carries most dialog and on-screen sound in movies

Evidence

Historically, the center channel loudspeaker has been treated overly casually, often a low-cost small box to fill a need. In movies, the center channel does most of the work, providing most of the dialog and much of the on-screen action sound. — Toole, Floyd E, Sound reproduction- the acoustics and…, 814

Categorization

• SEED: Angle: why the most important loudspeaker in a home theater (the center channel) is the one people spend the least on — a practical listener-protection essay.