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In 1877, Thomas Edison created a machine with two needles: one for recording and one for playback.
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A gramophone is a old-fashioned term for a record player.
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A small portable radio.
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An Audio Cassette Tape is an analog magnetic tape recording format for audio recording and playback.
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An 8-Track Tape is a magnetic tape sound recording technology that was popular in the United States from the mid-1960s to the late 1970s, when the Compact Cassette Track took over.
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It picks up a microphone or other transducer or video signals picked up by a camera or a similar device are converted into a steam of discrete numbers, representing the changes over time in air pressure for audio, and chroma and luminance values for videos.
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It is a portable audio player used to play compact discs.
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A Portable Transistor Radio is a small portable radio receiver that uses transistor-based circuitry.
