In sound recording, an acetate disc (or lacquer in the United States) is an audio disc used in the production of a gramophone record (for example, a LP record). The creation of the acetate disc allows audio engineers to determine how well a given recording will transfer to the final medium. Listening to the acetate disc may prompt an engineer to adjust the recording, ensuring optimal audio transfer to the masterdisc. The Beatles Magical Mystery Tour (1967) as a 33 â…“ LP vinyl record A gramophone record (also phonograph record, or simply record) is an analogue sound recording medium consisting of a flat disc with an inscribed modulated spiral groove starting near the periphery and ending near the centre of the disc. ... A gramophone record, (also phonograph record - often simply record) is an analog sound recording medium: a flat disc rotating at a constant angular velocity, with inscribed spiral grooves in which a stylus or needle rides. ... An Audio Engineer is a person recording, editing, manipulating, mixing and mastering sound by technical means. ... A master recording is an original recording, from which copies may be made. ...

After the advent of the promotional recording, the terms “acetate” and “promo acetate” came to refer to any vinyl record (and later, to any CD) that went from an inexpensive, low-quantity pressing into promotional distribution. A promotional recording, or promo, is a recording issued on vinyl, CD, cassette tape, VHS, or DVD and distributed free in order to promote a commercial recording. ... A Compact Disc (CD) is an optical disc used to store digital data, originally developed for storing digital audio. ...

Acetate discs serve as dubplates for DJs and producers. A dubplate is an acetate disc — usually 12 inches, 10 inches or 7 inches in diameter — used in mastering studios for quality control and test recordings before proceeding with the final master, and subsequent pressing of the record to be mass produced on vinyl. ... DJ or dj may stand for Disc jockey, dinner jacket The DeadJournal website, or Djibouti. ... In the music industry, a record producer (or music producer) has many roles, among them controlling the recording sessions, coaching and guiding the performers, and supervising the recording, mixing and mastering processes. ...

Historically, from the 1930s to the early 1950s they were used by the recording industry for original recordings made available via commercial release or specifically for broadcast (transcription discs). The practice fell into disuse from the late '40's onwards as magnetic tape progressively replaced the format in the creation of master recordings. The discs themselves are very fragile with a tendency to dry out (increasing surface noise) and can only be played a limited number of times. Compact audio cassette Magnetic tape is a non-volatile storage medium consisting of a magnetic coating on a thin plastic strip. ...

Despite their name, most acetate discs contain no acetate but comprise an aluminium disc with a coating of nitrocellulose lacquer. Acetate, or ethanoate, is the anion of a salt or ester of acetic acid. ... General Name, Symbol, Number aluminium, Al, 13 Chemical series poor metals Group, Period, Block 13, 3, p Appearance silvery Atomic mass 26. ... Nitrocellulose Nitrocellulose Nitrocellulose (also: cellulose nitrate, flash paper) is a highly flammable compound formed by nitrating cellulose through, for example, exposure to nitric acid or another powerful nitrating agent. ...