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Audio
Sound travels in the form of sound waves, and every sound that is transmitted begins and ends its life as a wave. The original sound recording and storage equipment was analog, meaning it stored audio information in a continuous wave-like manner. As technology progressed however, analog formats gave way to digital ones. The most visible example of this transformation was from records and tapes to CDs. Digital audio recordings store a representation of a sound wave in a form that can read and processed by a computer. Digital audio can be easily manipulated in a myriad of ways, it can be duplicated flawlessly, it can be compressed efficiently, it can be encrypted, and it can be easily transported over a network. For these and many other reasons, digital audio has dramatically changed the audio landscape.
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