Release

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A MusicBrainz release represents the unique release (i.e. issuing) of a product containing at least one audio medium (a disc, for example, on a CD release). Each release has one or more identifying properties, such as a release date and country, a label, a barcode, a specific type of packaging or a specific cover art.

If you walk into (or digitally browse) a store and see the standard edition of an album next to a deluxe edition of that same album, you're looking at two different MusicBrainz releases, which are grouped as part of the same release group.

Mediums have a format (such as CD, DVD, vinyl or cassette) and can optionally also have a title. For physical releases, each medium is the actual physical medium that stores the audio content. This means that each CD in a multi-disc release will be entered as separate mediums within the release, and that both sides of a vinyl record or cassette will exist on one medium. For digital releases, mediums are a more fluid concept, and should generally just follow the structure set by the artist or label. For example, a digital album that claims to include "disc 1" and "disc 2" should be added with two digital mediums, even if it can be purchased as one single folder of files or streamed in a single sitting.

Keep in mind there are some exceptional cases where the one disc to one medium equivalence does not apply. For example, the two sides of a hybrid SACD (the CD side and the SACD side) should be entered as two mediums. These exceptions are indicated in the release guidelines.

Every medium can (and should ideally have) a tracklist, which represents the set and ordering of tracks included in the medium, as listed on a liner, a digital store page, or any other official source. A medium can be empty (missing its tracklist) if its contents are not yet known to MusicBrainz users.

Examples

Style guidelines

Please see the guidelines for releases.

Release properties

Title

The title of the release.

Artist

The artist(s) that the release is primarily credited to, as credited on the release.

Date

The date the release was issued.

Country

The country the release was issued in.

Label

The label which issued the release. There may be more than one.

Catalogue number

This is a number assigned to the release by the label which can often be found on the spine or near the barcode. There may be more than one, especially when multiple labels are involved. This is not the ASIN — there is a relationship for that — nor the label code.

Barcode

The barcode, if the release has one. The most common types found on releases are 12-digit UPCs and 13-digit EANs.

Status

The status describes how "official" a release is. Possible values are:

official
Any release officially sanctioned by the artist and/or their record company. Most releases will fit into this category.
promotion
A give-away release or a release intended to promote an upcoming official release (e.g. pre-release versions, releases included with a magazine, versions supplied to radio DJs for air-play).
bootleg
An unofficial/underground release that was not sanctioned by the artist and/or the record company. This includes unofficial live recordings and pirated releases.
pseudo-release
An alternate version of a release where the titles have been changed. These don't correspond to any real release and should be linked to the original release using the transl(iter)ation relationship.
withdrawn
A previously official release that was actively withdrawn from circulation by the artist and/or their record company after being released, whether to replace it with a new version with some changes or to just retire it altogether (e.g. because of legal issues).
cancelled
A planned official release that was cancelled before being released, but for which enough info is known to still confidently list it (e.g. it was available for preorder).

Packaging

The outermost physical packaging that the release is sold or distributed in. See the list of packaging for more information.

Language

The language a release's track list is written in. The possible values are taken from the ISO 639-3 standard.

Script

The script used to write the release's track list. The possible values are taken from the ISO 15924 standard.

MBID

See the page about MBIDs for more information.

Disambiguation comment

See the page about comments for more information.

Annotation

See the page about annotations for more information.

Data quality

Data quality indicates how good the data for a release is. It is not a mark of how good or bad the music itself is - for that, use ratings.

High quality
All available data has been added, if possible including cover art with liner info that proves it.
Default quality
This is the default setting - technically "unknown" if the quality has never been modified, "normal" if it has.
Low quality
The release needs serious fixes, or its existence is hard to prove (but it's not clearly fake).

Currently, data quality has no further effect than helping users know what to expect from the data. Until 2012, data quality also used to influence the voting requirements for edits made to the release. While this is no longer the case, we mention it here because it can explain the notes and voting results of some very old edits.

Medium properties

Title

The title of this particular medium.

Format

The format of the medium.