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| Magnetic tape sound recording was first developed as early as 1929 and further refined in the 1930s, but it didn't catch on initially because the first machines were bulky reel-reel devices, the amount of tape required to make a recording was unwieldy, and the tape itself broke or damaged easily. |
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| It was invented in 1931 by Alan Blumlein, but not put to commercial use until 1958. It permitted the recording of two separate channels, or tracks, of sound. |
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| captures the fluctuations of sound waves and stores those signals in a record's grooves or a tape's continuous stream of magnetized particles. |
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| translates sound waves into binary on-off pulses and stores that information as numerical code. |
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| hit the market in 1983. By 1987, CD sales were double the amount of LP record album sales. By 2000, CDS rendered records and audio cassettes nearly obsolete, except for DJs and record enthusiasts who continue to play and collect vinyl LPs. |
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| a file format developed in 1992 that enables digital recordings to be compressed into smaller, more manageable files. |
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| music that appeals either to a wide cross section of the public or to sizable subdivisions within the larger public based on age, region, or ethnic background. |
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| was developed in New Orleans. An improvisational and mostly instrumental musical form, was absorbed and integrated a diverse body of musical styles, including African rhythms, blues, and gospel. |
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| a song recorded or performed by another artist. |
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