In sound recording an acetate disc is a reference audio disc used during production of a gramophone record (e.g. an LP record). The acetate disc is created as one of the initial stages of record production and used to determine how a given recording will transfer to disc. Listening to the disc provides a reference and allows various changes can be made to the recording, such as changing overall volume or adjusting bass and treble, to ensure it will transfer to record as well as possible before the master disc, from which the actual records will be reproduced, is created.
An acetate disc is actually usually an aluminium disc coated with nitrocellulose lacquer, most don't contain any acetate at all.
Disc and cylinder recordings are machine readable artifacts; they are documents whose physical well being is essential to preserve the integrity of the information that they contain.
Acetatediscs showing signs of palmitic acid deposits (a white, greasy substance on the disc surface) should be cleaned the same way as vinyl discs.
Acetatediscs decompose continuously and, over a period of time, react with water vapour or oxygen to produce acids that in turn act as catalysts for several other chemical reactions.
In sound recording, an acetatedisc (or lacquer in the United States) is an audio disc used in the production of a gramophone record (for example, a LP record).
Listening to the acetatedisc may prompt an engineer to adjust the recording, ensuring optimal audio transfer to the masterdisc.
Acetatediscs were also used for making copies of recording sessions allowing musicians to take a copy home, before the widespread use of 1/4" reel-to-reel magnetic tapes and later cassettes.
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