How are we able to compress digital data and make it so much smaller than its analog equivalent?

Question

What will be an ideal response?

Answer 1

Digital file formats take advantage of certain characteristics of the human ear and eye to reduce file size. For example, because the human ear cannot hear certain frequencies, we can eliminate these frequencies without reducing the quality of the song, while retaining other sounds the human ear hears much better than others. Additionally, we can eliminate other sounds because when two sounds are playing
imultaneously, humans hear the louder sound but not the softer one. We can take advantage of repeated data in our digital file, replacing a string of ones or zeroes with a fewer number of entries representing the same data.