Sound Engineering, which is also often referred as Audio Engineering, is a branch of audio science. Characteristically, sound engineering refers to the recording, copying, editing, mixing, and reproduction of sound by means of electronic and mechanical devices. Sound engineers employ a variety of recording devices such as high-tech microphones that are required to record even the slightest sound variations. Electronic mixing boards or console boards are an essential element of sound engineering that are used to control sound input while recording or editing music. They include a variety of switches, dials, lights, and meters. Lights and meters facilitate the engineers to understand exactly the sounds that are recorded and their intensity.