A Hard Day's Poll

Interesting mathematical attempt to determine what notes are being played in the opening of "A Hard Day's Night"

https://www.youtube.com/watch?v=xKx0DG-5Qyg

Okay granted this is about the film rather than the album, but:

https://www.criterion.com/films/28547-a-hard-day-s-night

New 4K digital restoration, approved by director Richard Lester, with three audio options—a monaural soundtrack as well as stereo and 5.1 surround mixes supervised by sound producer Giles Martin at Abbey Road Studios—presented in uncompressed monaural, uncompressed stereo, and DTS-HD Master Audio on the 4K UHD and Blu-ray

In the 4K UHD edition: One 4K UHD disc of the film presented in Dolby Vision HDR and one Blu-ray with the film and special features

Audio commentary featuring cast and crew (dual-format and 4K UHD only)

In Their Own Voices, a program featuring 1964 interviews with the Beatles with behind-the-scenes footage and photos

“You Can’t Do That”: The Making of “A Hard Day’s Night,” a 1994 documentary by producer Walter Shenson including an outtake performance by the Beatles

Things They Said Today, a 2002 documentary about the film featuring Lester, music producer George Martin, screenwriter Alun Owen, and cinematographer Gilbert Taylor (dual-format and 4K UHD only)

Picturewise, a program about Lester’s early work, featuring a 2014 audio interview with the director (dual-format and 4K UHD only)

The Running Jumping & Standing Still Film (1960), Lester’s Oscar-nominated short (dual-format and 4K UHD only)

Anatomy of a Style, a 2014 program on Lester’s methods (dual-format and 4K UHD only)

Interview from 2014 with Beatles biographer Mark Lewisohn (dual-format and 4K UHD only)

English subtitles for the deaf and hard of hearing

PLUS: An essay by critic Howard Hampton and excerpts from a 1970 interview with Lester (dual-format and 4K UHD only)