An analog audio recording pressed in vinyl. The 45 RPM record holds one song per side, while 33 1/3 RPM "Long Play" records hold an entire album (see ... of the original acoustic waves.

On that list, which is focused squarely on the bestselling physical releases in the U.K.--meaning any album shared on CD, cassette or vinyl--The Acoustic Sessions is new at No. 8. As is often the ...