"The letters ‘A I A’ that prefix the titles of the records are in fact intended as a word-picture denoting this relation: two objects, with a plane between them. Harris shares this information reluctantly: “I like having secret symbols and secret personal meanings to things, having your own pattern.”
Harris chose the letters as a reference to the phrase “Abyssus Abyssum Invocat”, from the Vulgate Bible’s translation of Psalm 42: “Deep calls to deep”. “There are different interpretations of what it means,” Harris explains. “Some people take it as an invocation of hell; one hell reaching out to another. To me they’re just voids, open spaces.”
It's from wire article, You can read it at this site (just scroll down): https://forums.hipinion.com/viewtopic.php?f=1&t=38575&start=120 :)
It isn't about the overall length of the project. I'll take a "complete" EP over an album with fillers any day. It is more about the way most of the songs themselves feel cut short and/or underdeveloped. I know that this might sound odd, given the fact that incompleteness is in a way an integral part of Grouper's "trademark sound", but to me there is a small but discernible difference between the way it was handled on "Grid of Points" and the approach taken on recent previous projects.