Editing Rock Around the Clock (section)

==Length variation==
Although originally released on vinyl 45 and shellac 78 at a running time of 2 minutes and 8 seconds, most digital/CD releases of the original 1954 recording, starting with the "From The Original Master Tapes" compilation of Haley's work with Decca Records, mastered by [[Steve Hoffman (audio engineer)|Steve Hoffman]] and released in 1985, clock in at 2:10. This is due to the inclusion of a "count-in" by one of the Comets (saying, "One ... two") at the very start of the song. This was never included in the original single or album releases of the song. (All of Haley's subsequent studio rerecordings of the song run longer than 2:10 with the exception of the abbreviated version recorded for ''[[Happy Days]]''.) There are no other studio-recorded versions after the 1950s and ''Happy Days'' versions.{{cn|date=October 2022}}