It had a working title of Casablanca Moon but was never released at the time because it had been rejected by their record label, Polydor.

The track titles on Acnalbasac Noom are identical to those on Slapp Happy, except for the track sequence, and that "Haiku" on Slapp Happy is replaced by "Charlie 'n Charlie" on Acnalbasac Noom.

[3] Musically, Acnalbasac Noom is arranged quite differently from Slapp Happy: it has a raw and unsophisticated "rock" feel about it, whereas Slapp Happy tends to be more sentimental and "dreamy" with complex arrangements, including a string orchestra.

While the unsophisticated feel of Acnalbasac Noom still appeals to many fans, it was the sentimental sound on Slapp Happy that the band became best known for.

The same remaster was also issued as a Japanese mini-LP sleeve with the original LP artwork.