Arp Life; turns out that Discophonia's a much more stripped-down affair.
The liner notes explain the album title as referring to the two intended purposes of the music: Disco tracks for dancing, and -phonia meaning tracks for sitting down to listen to. Things kick off in the former mode, with electric piano, phased funky guitar, a pumping bassline, and a vocal exclaiming "DISCO!" at regular intervals. This is just the intro to A1 (all the tracks are just titled in sequence like that) though, as it moves through different sections that show off the band's musical chops. A2 and A3 follow with more grooves, but getting progressively more relaxed; in particular, if someone introduced me to A3 as a great lost track from a KPM library record I wouldn't bat an eyelid.
A4 is pure mellowness by contrast, featuring ethereal vocals - intended, as per the liners, to act just as another instrument. B1 goes further by starting acapella before a mellow bassline and twinkling synths relax you just in time for its upbeat mid-section. B2 and B3 are just absolutely gorgeous electronica to finish, with barely-there drum machines and gentle keyboards; stuff of this calibre could've sat nicely on a Sky label release from the same time period. There's one more disco flourish right at the end to get you in the mood for starting from the beginning again. Very highly recommended.