[1] However, since the rise of digital and streaming services such as iTunes and Spotify in the late 2000s and early 2010s, the inclusion of hidden tracks has declined on studio albums.
For example, "Her Majesty," which is preceded by fourteen seconds of silence, was originally unlisted on The Beatles' Abbey Road but is listed on current versions of the album.
Alternatively, such things are instead labeled as vague audio experiments, errors, or simply an integral part of an adjacent song on the record.
Examples of double-grooving include Monty Python's 'three-sided' Matching Tie and Handkerchief, Tool's Opiate EP,[4] and Mr. Bungle's Disco Volante.
[6] A CD player will not play these tracks without manual intervention, and some models (including many computer operating systems) are unable to read such content.