Their songs played in regular floors and 10F/20F have the following naming convention:
Regular floors: a single English word that contains letters i, s and e. Each song has three variations and each variation has one letter replaced with a number.
Songs that include a 1 instead of an i are played from 1F to 9F
Songs that include a 2 instead of an s are played from 11F to 19F
Songs that include a 3 instead of an e are played from 21F to 29F
10F and 20F: every instance of the letter O is replaced with Greek letter Θ (theta); this usage may be owed to Θ being the eighth letter of the Greek alphabet.
Free Association's album artwork is an edited picture of the background of the Vending-Machine corner floors. The same view can be seen from the floor when looking right.
Etymology
Free association is a psychoanalytic technique designed to help patients express unconscious thoughts.
Names in other languages
The name of the artist is the same as English in all languages except for Japanese.
Japanese
