The word refers to a grand banquet for both sight and hearing.
"Audio-visual feasts" usually include music, dance, drama, movies and other forms, aiming to bring a pleasant and shocking experience to the audience. "Audio-visual" means seeing and hearing. "Feast" means a grand banquet or feast.
Entertainment activities in the form of "audio-visual feasts" are very popular in modern society because they allow people to obtain a large amount of information and feelings in a short period of time.