Audio is a term used to describe SOUND and its related technologies. The crossword solutions for the term audio include VIDEO (5 letters), SOUND (5 letters), ECHO (4 letters), STEREO (6 letters), PAS (3 letters), FEED (4 letters), and VISUAL (6 letters). VIDEO is the recording of moving images, while SOUND is the vibration of air that is perceived by the ear. ECHO is the repetition of SOUND due to reflection of SOUND waves, and STEREO is a type of SOUND reproduction that creates an illusion of directionality and depth. PAS stands for Program Associated SOUND, which is a type of audio signal used in television broadcasting. FEED is the input of audio or VIDEO signals into a system, and VISUAL is the perception of objects through sight.