The code is a wheel of twenty-six segments - one per letter of the alphabet - arranged like a clock. A sits at twelve, the others run clockwise. The first nine letters double as digits one through nine; the same color means A or 1 depending on what the rest of the strip is telling you. Zero is a tenth slot.

The mechanism was described at the time as juxtaposing the hieroglyphics of technology with historical classicism. The technology was the floppy disk and the looming idea of data; the classicism was the studied silence of a catalogue number printed in color rather than text. The decoder key didn't appear on the sleeve itself. About two months later, on the back of a companion release the same year, the designers printed the wheel.

The color values on this page are approximated from photographs of that companion sleeve, not from the designers' original CMYK mechanical. The mechanism is exact; the hex codes are courteous guesses, awaiting a verified scan.

companion sleeve back cover · canonical key

The single was recorded at a studio in London (mixed at another studio in England), programmed across a period drum machine, a period synth for the bassline, and a period sampler for accents. The sequencer that drove it all was a kit one of the band had assembled himself, because no commercial machine in 1982 could do what they wanted; MIDI didn't yet exist. An engineer was hired to design a circuit to lock the synthesisers and the drum machine together.

The famously off-grid syncopation - the way the synth bass sits slightly out of phase with the kick - was a happy accident. A band member accidentally added an extra rest while transcribing the binary sequence into the sequencer; the part landed slightly displaced from where it was meant to. The band heard it, liked it, kept it.

Tempo: about 130 BPM. The bass riff is sequenced rather than played - a bass guitar plays a counter-melody over it on the live versions. (Published transcriptions disagree on the key - some call it D minor, others F minor; the audio underneath this page sits in D minor.)

London studio · period drum machine · period synth · homemade sequencer

The sleeve had to be die-cut three times to read as a floppy disk - the silver-grey card, the spindle hole, the read-window slot - and the four-color print on top added more cost on top of that. The design studio billed the label £538.20 for the design; the manufacturing was its own number.

The label's own gloss on the unit economics, repeated for decades: it lost fivepence per copy "due to our strange accounting system." Other voices from the label (a band member's memoir, later, among them) pushed the figure higher; the claim was that it sold for about a pound and cost a pound-ten to make, the difference being mostly the sleeve. The exact loss is one of the disputed numbers of British music history.

The standard joke around the label was that nobody had expected the record to sell, so nobody had stress-tested the math. The designers have noted in interviews that the economics were predicated on a modest pressing run, and that the success of the single took everyone by surprise.

By the late 1980s the design was retooled cheaper; later pressings carried the color code as a printed strip rather than a die-cut. The original 1983 sleeve became, almost immediately, a collector's object - the very thing the label had been ambivalent about wanting.

Monday Decoder is the second piece in BeSides - a small catalog of album-cover lifts. It takes the sleeve's color wheel at its word and makes the cipher real-time: type anything in the box at the bottom, watch the bars on the sleeve re-color to spell what you wrote, hover any bar to read its letter, and export your message as an SVG strip you can paste into anything.

Some teaching the piece sits next to without insisting on:

One. The cipher is not encryption. Anyone with the wheel can read it. It hides only against the un-curious. That is, very often, enough.

Two. The sleeve hides the band name and song title behind a color code, in front of a die-cut nothing, on the front of a record people bought to dance to. Three doors of withholding. A song that became the best-selling 12-inch single of all time arrived without naming itself.

Three. This sleeve came from a two-person design partnership, and design credit for that kind of partnership often collapses onto one name while the other collaborator goes quietly uncredited. We're keeping that imbalance in view here, even while declining to name either designer directly.

three.js · Web Audio API · renato.design · b-side