Compare and contrast digital audio vs. analog. need plz assignment due today

A digital signal might be a discrete representation of an analog wave form. that's the big difference between analog and digital waves. Analog waves are smooth and continuous, digital waves are stepping,square and discrete.

photography had emerged as an elite art pursued by a few creative individuals for a few wealthy patrons. but now, said bauldelaire, it was succumbing to "the great industrial madness of our times." it was becoming a mass production industry that catered to middle-class tastes, including a taste for gadgetry. the stereoscope, the first 3d imaging system, had turned looking at photographs into parlor entertainment. a "thousand hungry eyes were bending over the peepholes of the stereoscope as though they were the attic-windows of the infinite.