was sold to Capital Records in 1972 who sold it off in the late 1980s at which point it became the Apollo Masters Corporation. The lacquer coating wears much quicker than standard shellac or vinyl records, and a chipped stylus can damage the disc in one play.Īudio Devices, Inc. They were available in different sizes, including 7, 10 and 12-inches in diameter. Like professional lacquer discs, the core of an Audiodisc is made of aluminium, making the disc much heavier than a standard shellac or vinyl disc.Īudiodiscs are likely to have handwritten information on the label, and can be difficult to date although various designs of label have been used over the years that may help with dating. As they were mostly used on simpler home recording devices, they had an extra (sometimes three extra) drive pin holes to prevent slippage – commercial disc cutting machines such as those used to create master discs would have used a vacuum to hold the disc in place.
#33 rpm acetate master license#
They were made under license from the Pyral company in France that had invented the nitrocellulose lacquer-coated disc in 1934 and that also licensed the process to EMI for their Emidisc brand in the UK.Īudiodiscs were mostly used for home recordings but were sometimes used by recording studios to give to clients to hear at home what they had recorded in the studio. Audiodisc is a brand of lacquer disc (sometime known as acetate or instantaneous disc) that was introduced to the US market in 1938 by Audio Devices, Inc.
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