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Highway Hi-Fi was a system of proprietary players and seven-inch phonograph records with standard LP center holes designed for use in automobiles. Designed and developed by Peter Goldmark, [1] who also developed the LP microgroove, the discs utilized 135 grams of vinyl each, enough to press a standard 10-inch LP (12-inch LPs of the period commonly used 160 grams of vinyl each and 45s used ...
Three vinyl records of different formats, from left to right: a 12 inch LP, a 10 inch LP, a 7 inch single. A phonograph record (also known as a gramophone record, especially in British English) or a vinyl record (for later varieties only) is an analog sound storage medium in the form of a flat disc with an inscribed, modulated spiral groove.
This recording format's development was sponsored by the American Foundation for the Blind. One 10-inch record holds four hours of speech with the 12-inch variety holding six hours and the 7-inch variety holding roughly 90 minutes. [11] The format was later used to distribute magazines on nine-inch "flexible discs" recorded at the same 8 + 1 ...
In the company's early years, Victor issued recordings on the Victor, Monarch and De Luxe labels, with the Victor label on 7-inch records, Monarch on 10-inch records and De Luxe on 12-inch records. De Luxe Special 14-inch records were briefly marketed in 1903–1904. In 1905, all labels and sizes were consolidated into the Victor imprint. [6]
The LP (from long playing [2] or long play) is an analog sound storage medium, specifically a phonograph record format characterized by: a speed of 33 + 1 ⁄ 3 rpm; a 12- or 10-inch (30- or 25-cm) diameter; use of the "microgroove" groove specification; and a vinyl (a copolymer of vinyl chloride acetate) composition disk.
In some regions (e.g. US), the default hole size fitted the original RCA 1.5-inch (3.8 cm) hub which, due to a format war, was incompatible with the 0.25-inch (6.4 mm) spindle of a Columbia-system 33 1/3 RPM 12-inch LP player. In other regions (e.g. UK, Australia), the default was a small hole compatible with a multi-speed 0.25-inch spindle ...
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