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What is digital audio?

Analogue audio is a method for representing the unique shape of a changing air pressure energy soundwave, in another form of energy, such as electricity or magnetism, in order to transmit, process, amplify or store it.

In essence, a pattern of changing air pressure energy is converted by a microphone into an electrical pressure signal which retains the same pattern. The signal may then be processed, amplified and sent to a loudspeaker system, or converted to a pattern of magnetic flux stored on analogue recording tape.

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