[3] Such notes often contained a mix of factual and anecdotal material, and occasionally a discography for the artist or the issuing record label.
Liner notes were also an occasion for thoughtful signed essays on the artist by another party, often a sympathetic music journalist, a custom that has largely died out.
[6][7] It contains information that accompanies a musical work, including artist name, song title, song length, ISRC code, catalogue number, composer, publisher, rights holder, technical and artistic credits, A&R and producer credits, recording dates and locations.
[4][9] However, the information provided on liner notes varies considerably depending on the studio or label which produced the record.
[11][12] In 2019, French company Qobuz launched official music credits and digital liner notes booklets appearing in the player.
[19] As of 2020[update], it was estimated that up to 94% of recordings are now supplying the official music credits feed direct from the owners of the data to streaming services such as Spotify, Amazon, Google, Tidal, Pandora, Qobuz and more,[20] as well as databases such as Gracenote, but not all services are displaying the data they are sent at this stage.