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Microphone is a device used to record audio data (voice, music, other sounds) into computer.

To enable the computer to store and process a signal from a microphone, it must first be digitised.

This requires an Analogue to Digital Converter (ADC). The raw microphone signal, picked up by air pressure, is analogue.

The first thing that a computer does (or the USB capture device), is to assign a value for thousands of samples points of sound pressure level. Each value is traditionally between the values 0 and 255. The sample rate may vary, but the more sample points the more fidelity.

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Q: What kind of data does a microphone use to get data into a computer?
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