What commonly accompanies audio tones to aid in calibration during production?

Color Bars are commonly used alongside audio tones during calibration in production settings. This is because they serve as a standardized reference for visual quality and are crucial for ensuring that the color output of the video is accurate. When a production team calibrates their audio equipment, they often also calibrate their video equipment to maintain a consistent standard across both elements.

The audio tones help technicians adjust audio levels and frequency response, while color bars provide a visual reference to set exposure, contrast, and color balance on the video side. This dual calibration process ensures that both audio and visual components meet professional standards, leading to a polished final product.