What is digital sound?
Digital sound is a rather silly name.
Digital refers to how the sound is stored, as a huge number of
ones and zeros. Ths stream of ones and zeros can then be fed as
instructions to something like a computer, or something that works
like a computer, and the computer will understand the instructions
and turn them into something called an analouge(or analog)electric
signal which then can be turned into sound by a set of headphones
or speakers.
Sound, the "thing" that we hear, is never digital.