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A '''master recording''' is an original [[recording]], from which copies may be made.

When recording on to magnetic or digital tape, the original tape is known as the master tape.
When recording on to a computer hard disk, is known as session files.

A [[multitrack recording]] master tape, disk or computer files on which productions are developed (or captured, in a live session) for later [[audio mixing|mixing]], is known as the multi-track master, while the tape, disk or computer files holding a mix ([[monaural|mono]], [[stereophonic sound|stereo]] or [[Surround sound|Surround]]) is called a mixed master.

It is standard practice to make a copy of a master recording, known as a safety copy, in case the master is lost or damaged.

==Definition==
The phrase "original master recording" began in the period of acoustical audio recording - one "cuts"  a recording because the sound is literally cut into the record. The resulting record was then used as the "master", or original prototype from which further [[Gramophone record|vinyl]] or [[Acetate disc|acetate]] copies could be pressed.

There is only one original master recording, and that's the recording made at the time of the original recorded performance, but the term "master" is commonly used to describe almost anything used as a source.

There are several methods by which master recordings are created. The first (and oldest of those in current technological use) is "direct to tape." This is where one ([[monaural|mono]]), two ([[stereophonic sound|stereo]]), or more microphone signals are equalized, mixed, and recorded directly to a [[monaural|mono]] or [[stereophonic sound|stereo]] (2 track) tape. This tape is the master.

The other method is called "[[multitrack recording]]" and most recently in digital terms, "session files". By these methods, each microphone signal or line input is recorded to its own track on a multi-track recorder. At a later time, the signals that were recorded on this multi-track format will be reproduced, equalized, and mixed down to a [[stereophonic sound|stereo]] or [[monaural|mono]] tape, which is also called the master tape.

A multi-track tape may be remixed many times, in different ways, on different days, by different engineers, giving the possibility of several masters (AM radio version, mono version, LP stereo version, single version, guitarist's personal version with lead solos emphasized, etc). Any of these would have the designation "first generation", but not necessarily "master", which means there could be many alternate mixes. With multi-track recording one has the option of changing the emphasis on any given instrument, replacing it or omitting it entirely.

==Ownership of the master==
Song masters and album masters are considered [[intellectual property]].  As with physical 
property, ownership is acquired by purchasing it, creating it or inheriting it.  In this sense, 
the intellectual property concept applies similarly in the purchase of a house, a car or any 
other property.

Before a song or album master is released, the value of the master is determined by the 
cost to produce it. After release, the value of the master is determined by its potential to sell CDs. The master and all rights associated with it may be sold for several times the 
production cost or "recoupable cost".

===Masters with respect to [[independent music]] and major label recording contracts===
In a typical independent artist/production deal, the artist will pay the studio up front to produce songs or an album of songs. In this deal, the artist, having financed the project, owns the master. If the studio, production company or record company finances the master, sometimes called a "spec" deal, then that studio or company owns the master.

Major record companies and their major indie satellite labels will not offer the artist the option to finance the production of their own master. This is because major labels have an interest in building and maintaining their catalog of albums, and as a result, will likely own the masters indefinitely.

An independent artist may also do a [[distribution deal]] where the independently produced master is temporarily licensed to a major label, and then returned to the original owner; the artist, manager, producer or investor as the case may be.

===Sale of the Master vs. Sale of Albums===
A recording may generate revenue for the artist and studio/record company simultaneously, 
regardless of who owns the master. The breakdown of revenues from CD sales, also called 
"mechanical [[royalties]]", is determined by the terms of the recording contract. Mechanical 
royalties are divided between the artist and the studio or record company in accordance with 
the terms that the artist has negotiated with that company.

Sale of the master refers to a buyout of the [[intellectual property]], usually by a major label. If an independent record becomes very popular, a label could consider buying the master. In this 
instance, the buyout price will usually be several times the raw cost (recoupable cost) of producing the recording. It is rare that an artist will purchase the master recording after its release. This may be possible under the terms of an independent release, but major labels do not normally sell their masters.

==See also==
*[[Audio mastering]]

[[Category:Optical disc authoring]]
[[Category:Recording]]
[[Category:Sound recording]]

[[es:Máster de grabación]]
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[[ru:Мастер-диск]]
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