All songs were originally credited to Gary Brooker (music) and Keith Reid (lyrics), except "Repent Walpurgis" written by Matthew Fisher, after works by French organist Charles-Marie Widor and German composer Johann Sebastian Bach.

Lord David Neuberger of Abbotsbury's opinion stated: "Fisher's subsequent contribution was significant, and, especially the introductory eight bars, an important factor in the work's success...".

As recently as 2004, the original single, mixed to stereo, has appeared on a "Dick Bartley Presents: Classic Oldies" compilation on Eric Records.

The artwork by Dickinson, the then-girlfriend, and subsequently wife of Keith Reid was heavily influenced by the style of the late-Victorian illustrator Aubrey Beardsley.

The set includes bonus singles of the original monaural and alternate stereo versions of "A Whiter Shade of Pale".

A 2009 remaster by Salvo Records, using the original mono masters, was released, with bonus tracks including the singles "A Whiter Shade of Pale", "Homburg", B-sides and alternate stereo takes.

[5] In his retrospective review of the album, Bruce Eder of AllMusic wrote: "Not everything here works, but it holds up better than most psychedelic or progressive rock."